2004 BMW 645Ci Road Test Specs | Edmunds

2004 BMW 6 Series - Road Test Specs

2004 BMW 6 Series Coupe

(4.4L V8 6-speed Manual)


Model year2004
Model6 Series
Style645Ci 2dr Coupe (4.4L 8cyl 6M)
Base MSRP$69,995.00
As-tested MSRP$75,995.00


Drive typeRWD
Engine typeDOHC V8
Displacement (cc/cu-in)4.4
Horsepower (hp @ rpm)325@6100
Torque (lb-ft @ rpm)330@3600
Transmission type6-speed manual


Suspension, frontAluminum double-pivot strut-type independent
Suspension, rearAluminum four-link independent
Steering typeSpeed sensitive, variable assist, variable ratio power rack and pinion.
Tire brandBridgestone
Tire modelPotenza RE050A
Tire size, front245/40R19
Tire size, rear275/35R19
Brakes, frontFour wheel electronically controlled disc.

Track Test Results

0-45 mph (sec.)3.8
0-60 mph (sec.)5.6
0-75 mph (sec.)8.3
1/4-mile (sec. @ mph)14.16@99.51
Braking, 30-0 mph (ft.)28.03
60-0 mph (ft.)120.51
Slalom, 6 x 100 ft. (mph)64.3
Skid pad, 200-ft. diameter (lateral g)Not Tested
Sound level @ idle (dB)Low
@ Full throttle (dB)74
@ 70 mph cruise (dB)72

Test Driver Ratings & Comments

Acceleration commentsThe BMW's acceleration is impressive. The 645 has plenty of torque, and with all the traction and stability controls turned off it will easily smoke the tires. Our best launches were achieved with moderate wheel spin by letting out the clutch around 2,000rpm, and traction was a problem through most of first gear and into second. The transmission works well, it feels like a typical BMW when rowing through the gears, and while the shifter has a tad too much resistance when changing gears, its close to perfect. The broad powerband and excellent low-end torque combined with wide tires make for a stable and comfortable ride even under hard acceleration. The clutch held up admirably, even after several hard launches that would have left previous bimmer clutches fried and smoking.
Braking ratingExcellent
Braking commentsWhen it comes to braking, BMW did everything right on the 645ci. Even after making multiple panic stops there was no sign of fade, and our third stop was actually shorter than first two. Brake pedal feel is essentially perfect, with virtually no ABS noise or vibration, and the pedal itself has a progressive buildup of pressure before it stops moving altogether when it hits the maximum braking braking point and the ABS kicks in. Under hard braking there was almost no frontend dive and the car tracked perfectly straight, this is how all brakes should be.
Handling ratingExcellent
Handling commentsThe steering feel was basically perfect, with weighting and responsiveness as good as you're going to get short of a pure exotic such as a Ferrari. The car had no detectable body roll through the slalom, and the stability control is totally unobtrusive. The 4.4L V8 offers lots of torque, but unforunately the engine was right at redline at the speeds the car was going through the slalom in second, so we had to use third, which didn't offer quite as much torque pulling out of the last two cones. In sport mode it was very easy to control, and turning off the traction and stability controls really had no affect on our ability to get through the slalom, which is rare. This is most likely due to the car being so well balanced and smooth, there's no need for the traction control to even turn on. The 645 is a very capable luxurious coupe, and all that luxury actually masks its capabilities in terms of performance. Going through the slalom you would have no idea that you're going as fast as you are because there is so little drama.

Testing Conditions

Elevation (ft.)Not tested
Temperature (°F)Not tested
Wind (mph, direction)Not tested

Fuel Consumption

EPA fuel economy (mpg)Auto 18/26 Manual 17/25
Edmunds observed (mpg)15.7
Fuel tank capacity (U.S. gal.)18.5

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)3781
Length (in.)190.2
Width (in.)73
Height (in.)54.1
Wheelbase (in.)109.4
Legroom, front (in.)42
Legroom, rear (in.)28.8
Headroom, front (in.)37.3
Headroom, rear (in.)35.5
Seating capacity4
Cargo volume (cu-ft)13 cu. ft.
Max. cargo volume, seats folded (cu-ft)13 cu. Ft.


Bumper-to-bumper4 years / 50,000 miles
Powertrain4 years / 50,000 miles
Corrosion12 years / unlimited miles
Roadside assistance4 years / 50,000 miles
Free scheduled maintenance4 years / 50,000 miles full maintenance


Front airbagsStandard
Side airbagsStandard
Head airbagsStandard
Antilock brakesStandard
Electronic brake enhancementsElectronic brake proportioning, Dynamic Brake Control, cornering/braking stability enhancement
Traction controlStandard
Stability controlStandard
Rollover protectionNot available
Emergency assistance systemStandard
NHTSA crash test, driverNot tested
NHTSA crash test, passengerNot tested
NHTSA crash test, side frontNot tested
NHTSA crash test, side rearNot tested
NHTSA rollover resistanceNot tested

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