Used 2007 Audi RS 4
Edmunds' Expert Review
Faster than an M3. Heavier than an M6. More expensive than two Evos. The 2007 Audi RS 4 is still incredible to drive.
With the current crop of ultra-performance sedans coming out of Germany, Audi has typically been left in the shadows of the AMG products from Mercedes-Benz and the M products from BMW. Now, with the 2007 Audi RS 4, the folks from Ingolstadt show they are serious about making a mark in this prestigious segment.
Essentially an S4 taken to a higher level, the Audi RS 4 has an even more powerful V8, bigger brakes, a more sporting chassis and exclusive interior trim. It also has a much higher price tag. Subtle yet powerful design differences, such as aggressively flared wheel openings, a discrete deck lid spoiler and 19-inch, double-spoke wheels separate the RS 4 from the S4.
In addition to the car's 420-horsepower V8, Audi's well-developed quattro all-wheel-drive system gives the RS 4 an edge over its rear-drive rivals. Sure, traction control and stability control (which of course come on the RS 4 as well) will help the competition in bad weather. But nothing can equal the grip and control all-wheel drive provides on slippery pavement.
For all the important yardsticks by which an ultra-performance sedan is measured, the Audi RS 4 does itself proud. Acceleration, braking, cornering and ride quality are all superb. And while there's no doubt its price tag is significantly large, for driving enthusiasts who live where the rain and snow sometimes fall, the RS 4 is the only way to fly.
Trim levels & features
The 2007 Audi RS 4 is a compact ultra-performance sedan that's based on the S4 performance sedan, which in turn is based on the A4 entry-level luxury/sport sedan. Standard features include 19-inch wheels with 255/35 high-performance tires, Dynamic Ride Control suspension, bi-HID headlights, Recaro sport seats with power adjustment, and front seat heaters. Napa leather upholstery, carbon-fiber cabin trim, dual-zone automatic climate control, a 10-speaker audio system with six-disc CD changer, a sunroof and rear park assist are also standard. A premium package is optional and includes auto-dimming mirrors, a navigation system, an upgraded Bose audio system with Sirius satellite radio, heated rear seats, Homelink, a power rear sunshade and Bluetooth capability.
Performance & mpg
A 4.2-liter V8 engine powers the Audi RS 4. Equipped with direct fuel injection and sporting a 12.5:1 compression ratio, this powerhouse makes 420 horsepower and 317 pound-feet of torque. A six-speed manual gearbox (the only transmission offered) sends the power to all four wheels through Audi's quattro all-wheel-drive system, which has a 40/60 front-to-rear power split in this application. During instrumented testing conducted by Inside Line, an RS 4 shot to 60 mph in 4.7 seconds and ran the quarter-mile in 13.2 seconds at nearly 107 mph.
Highlights of the cabin include Recaro seats with 12-way power adjustment, carbon-fiber trim on the dash and doors, and contrasting piping on the napa leather upholstery. Fine fit and finish, an Audi hallmark, are evident throughout. To allow cargo flexibility, the rear seat is a split-folding design that also incorporates a "ski sack" so long, skinny items can be transported inside the car while still carrying four passengers.
With more than 400 horsepower and the grip of all-wheel drive, the RS 4 has no problem catapulting itself off the line or out of a corner. With a broad torque spread, there's always power on tap. Apart from the incredible acceleration, the RS 4 makes a strong showing in the braking and handling departments. Through the curves, the RS 4 is a composed master despite is hefty curb weight. Inside Line testers recorded a slalom speed of 70.6 mph, which puts the RS 4 in an elite circle of cars with four doors. Confidence and grip from the front tires are superb, balance is good and steering feel at speed is better than any Audi car we've ever driven.
Stability control, antilock brakes with brake assist, front seat-mounted side airbags and full-length head curtain airbags are all standard on the 2007 Audi RS 4. Official crash tests have not been performed on the RS 4, but one could assume with fair confidence that its scores would be similar to those of the regular A4 sedan.
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Features & Specs
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If the engine is the soul of every car, then the 2007 Audi RS 4 has more character under its hood than most performance cars possess from tip to tailpipe. With 4.2 liters of direct-injected aluminum fury, its V8 makes 420 horsepower and 317 pound-feet of torque, and revs to an unbelievable 8,250 rpm.
Now that's some soul. And it's all forward of the front axle.
Any V8, even an aluminum V8, hanging forward of the front axle should do awful things to any car's handling. But in the RS 4, it doesn't.
Just like Porsche, Audi seems to have thwarted both mechanics and inertia with the RS 4. Audi engineers are saddled with this less-than-ideal design constraint in every model utilizing a longitudinal engine layout. Still, we drove it harder than any socially responsible owner ever will, fully expecting a hard lesson in Newtonian physics. It never happened.
The RS 4 is a composed master of winding roads. Confidence and grip from the front tires are superb, balance is good and steering feel, at speed, is better than any Audi we've ever driven. Audi's Servotronic steering increases pressure to the steering rack based on vehicle and steering speed. The ratio is almost Evo quick at 13.1:1 but feels far calmer on the road than the feline reactions of the Mitsubishi. There's something very German about the steering — probably thanks to proprietary bushings that locate the rack. It lacks the texture and resolution of the sharpest systems, but offers more than enough feedback and response during hard cornering to go very, very quickly.
The RS 4's character is very different from, say, a BMW M3, which is lighter. In an M3 the chassis and road connect via the driver. The result is an experience that can only be had with less weight and fewer mechanical interruptions. The RS 4 is probably quicker on most roads, but don't expect M3 levels of involvement from a car that's only 19 pounds shy of two full tons.
With the RS 4, Audi has created a near perfect ride/handling trade-off. Part of the magic is Dynamic Ride Control, which links diagonally opposite front and rear dampers with a gas-charged reservoir. The mechanical system allows more compliance when front and rear dampers are compressed at the same time, ensuring a comfortable highway ride with minimal compromise during performance driving.
The RS 4's 4.2-liter V8 shares only its bore, stroke, power steering and water pump with the S4 engine. Direct injection mandated new cylinder heads, yielding a 12.5:1 compression ratio. Both the intake and exhaust cams are given 40 degrees of valve timing control.
Pushing the "S" button mounted on the dashboard further excites the RS 4's soul. It quickens throttle response and opens additional valves in the mufflers and intake to allow anyone within earshot to appreciate its 8,250-rpm salute.
Even at low rpm the V8 is eager and provides ample motivation. Ninety percent of the engine's torque is available from 2,250 to 7,600 rpm. This flexible power delivery gives the car its unique character. It's virtually impossible to catch the engine off guard regardless of gear selection, but it never has the brick-to-the-kidneys punch of a large-displacement V8 either.
Wind the V8 to the end of its range and it'll stir your soul with an anthem of German-engineered combustion thunder. The last 2,000 rpm seems to go on forever and makes the RS 4 more flexible than any car in its class. It's Porsche 911 performance with Audi A4 practicality. It will change the way you think about driving fast. Even coming out of slow corners we found ourselves comfortably up a gear from many cars we've driven over the same roads.
Part of that cornering speed is thanks to the RS 4's quattro all-wheel-drive system. Audi updated the RS 4's center differential switching from a viscous unit to a Torsen differential with a 40/60 rear-biased torque split. A six-speed manual transmission backs up the all-wheel drive.
Further expanding the RS 4's performance repertoire are massive 14.4-inch front rotors with fixed eight-piston calipers. The system's strength is in its ability to invisibly turn massive speed into heat without drama. It will, without a reduction in performance, slow the car from 130 to 70 mph time after time. NACA brake ducts in the underbody reduce brake rotor temperatures by 170 degrees at speed.
Under heavy braking we found the RS 4 slightly nervous, which was disconcerting at high speeds. This behavior is likely the only perceptible result of the undeniable effect of physics, given the RS 4's engine position. Its front tires bear 59 percent of its weight in static conditions. Increase that burden with some massive weight transfer, add in the effects of aerodynamic forces and driver reaction and squirminess is the result. It's not a deal breaker, but it will wake you up if you must slow down quickly.
The massive brakes conspire with the RS 4's sticky Michelins to haul the car from 60 to zero in only 107 feet and exhibited zero fade during our testing. In fact, as their temperature rose on consecutive runs, braking distances decreased — the mark of the truly high-performance system. Pedal feel isn't as solid as we would like, but it is as stubbornly consistent as any racecar we've driven.
Stephan Reil, director of technical development at quattro GmbH (Audi's performance tuning division), is the man largely responsible for the RS 4's driving character. He told us Audi benchmarked cars like the M3 CSL and Porsche 911 Carrera 4S when developing the RS 4.
He wouldn't tell us which one was fastest around the Nürburgring — a little matter of political correctness he claimed — but he did say that the RS 4 was capable of lapping the famous circuit in the very low 8-minute range.
Reil's biggest goal was that RS 4 drivers be able to feel the character of the car, which is the real reason the stability control can be fully disabled by holding the ESP button down for 3 seconds. Push it once and it simply disables traction control. Hold it down and you assume full responsibility for the RS 4's dynamics. We like full responsibility in a car this capable.
The look, the feel
Adding some sex to all that stomp are the most bulging, glorious fender flares this side of a Renault R5 Turbo. They're necessary to cover a track width 1.5 inches wider up front and 1.9 inches wider in the rear than the S4. Given the rear fender change, Audi's stylists saw fit to carve in the most brilliantly integrated rear deck lid spoiler ever devised. It adds a touch of functional class to the car's hindquarters, and in combination with the flares, makes the RS 4 look like it can deliver the business its engine promises.
The split seven-spoke wheels measure 19-by-9 inches and do an appropriate job filling the fenders with 255/35-19 Michelin Pilot Sport tires. The RS 4 sits 1.1 inches lower than a standard A4 as well.
There's no confusing the RS 4's interior with that of the standard A4. Silk napa leather lines all the seating surfaces, and the heavily bolstered front seats are embossed with the RS 4 logo. Carbon-fiber trim accents the dashboard, door panels, center console and ashtray doors front and rear.
At the track the RS 4 proves its mettle, launching from zero to 60 in just 4.7 brain-cell-punishing seconds. The quarter-mile disappears in 13.2 seconds at 106.8 mph.
The shifter and clutch take-up don't have the near perfect feel achieved by the BMW 3 Series or the quick-action of the Mitsubishi Lancer Evolution's controls, but they aren't cause for complaint either. Luckily, with such a spectacularly flexible power plant, you don't have to use them as often as you would in either of those cars.
Through the slalom the RS 4 again defied conventional thinking by demonstrating an almost unthinkable ability to go where it was pointed. Its 70.6-mph slalom speed ranks it second fastest among every sedan we've ever tested. Mitsubishi's iconic Evo holds the record only 0.1 mph faster at 70.7 mph. Lateral grip was also stellar at 0.90g, with at-the-limit balance tending toward mild understeer with reasonable adjustability.
You get what you pay for
All that performance doesn't come cheap. Our test car, which was fully loaded with the $4,700 premium package and rear side airbags ($350), stickered for $73,870 including destination fees and the mandatory $2,100 gas-guzzler tax.
There's no denying $70 grand is a lot of green for any car, even one this capable. But there's little doubt that the RS 4's biggest competition, the upcoming BMW M3, will cost about the same and make similar power. It might not be cheap, but it's hard to put a price tag on soul.
System Score: 10.0
Components: As part of the optional premium package, our RS 4 had an upgraded Bose audio system with 10 speakers, Sirius Satellite Radio, a six-CD changer in the glovebox and SD memory card slots for playing stored music. A six-disc changer that's housed in the dash is standard, but if you opt for the premium package, that changer moves to the glovebox to make room for the memory card slot and navigation system that's also part of the package. Steering-wheel-mounted audio controls are also standard.
Performance: There's no guarantee that the Bose name alone indicates a top-notch listening experience, but this upgraded Bose system in the RS 4 is one of its finest systems to date. Utilizing nearly every tool in the Bose arsenal, this system serves up sound quality that will have you looking forward to the drive home. Between its simulated surround sound and the nearly perfect tonal separation, this system lets you hear every note. Vocals come through with a warmth and clarity that you rarely hear in an automobile while the bass response is the best we've heard from any system. Backing vocals that get lost on lesser systems sit just off to the side with this setup, filling out songs with details that you've probably never even heard before. No matter what your favorite genre of music is, it will sound outstanding coming through this system.
In addition, this stereo offers several options for playing music. Whether it's a standard CD, MP3 CD or music stored on SD cards, Audi has you covered — add Sirius Satellite Radio and the RS 4 is virtually begging for a road trip.
Accessing that music is also very easy, as Audi's Multi Media Interface (MMI) is one of the more intuitive interfaces around. MP3 files and tracks are displayed in a list, as are satellite and broadcast radio stations. Navigating that list is very easy via a dash-mounted knob or redundant steering wheel controls. The bottom line is that the system is very user-friendly.
Best Feature: Deep, clear bass that tops many rivals.
Worst Feature: Optional navigation system moves the CD changer to the glovebox.
Conclusion: Easily one of the finest factory audio systems on the market today, this system will satisfy even the most discerning audiophiles. — Brian Moody
Dan Edmunds, Director of Automotive Testing says:
Our office is in the process of wrapping up a long-term test of this car's less athletic sibling, the Audi A4. I really enjoyed that car, with its respectably torquey 2.0-liter turbocharged engine and well-sorted road manners. My 7-year-old daughter, Sarah, liked it, too, asking, "Can we get one of these?" and proclaiming in her sing-song voice, "I like the zero-zero-zero-zero company."
And then I drove this here new-fangled RS 4. Ho-lee cow. The 4.2-liter V8 turns this mild-mannered "nice" car into a cruise missile — with an armed warhead. And the sound of it. Whether I was standing a quarter-mile away while Josh flogged it around the track, or if I was the grinning idiot behind the wheel, the reverberations it emitted were positively gnarly — in the best possible sense of the word. More impressively, all of that power and fury is tamed and usable by mere mortals thanks to quattro all-wheel drive, excellent chassis tuning and massive brakes.
The zero-zero-zero-zero company got it right with this one. Even my daughter, properly belted in the backseat, is sure to notice the difference. Sarah, can I get one of these?
Edmunds.com Editor in Chief Karl Brauer says:
With cars being as generally good as they are in 2006, and with the performance variants being as truly exceptional as they are these days, it's not easy to stand out in the world of in-house tuners. The Audi RS 4 doesn't stand out — it rockets past the bulk of them while emitting a guttural roar that would be welcome on the high banks of Daytona International Speedway. The 4.2-liter V8 makes the RS 4 feel perpetually locked and loaded, constantly urging you to pull the 420-horsepower/317-pound-feet trigger. Better still are the drop-anchor brakes and grippy all-wheel drive that balance the car's "great power" with "great responsibility."
People say this is an M3 competitor. I say the RS 4 has too many doors, too many driven wheels and too much torque to waste time on the current M3. Let's get this David on a track with the Goliaths from BMW (M5) and Mercedes (E55) and let the stopwatch decide. I'm betting the results would surprise many .
Used 2007 Audi RS 4 Overview
The Used 2007 Audi RS 4 is offered in the following submodels: RS 4 Sedan. Available styles include quattro 4dr Sedan AWD (4.2L 8cyl 6M).
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Should I lease or buy a 2007 Audi RS 4?
Is it better to lease or buy a car? Ask most people and they'll probably tell you that car buying is the way to go. And from a financial perspective, it's true, provided you're willing to make higher monthly payments, pay off the loan in full and keep the car for a few years. Leasing, on the other hand, can be a less expensive option on a month-to-month basis. It's also good if you're someone who likes to drive a new car every three years or so.