2009 BMW Z4 sDrive35i Road Test Specs | Edmunds

2009 BMW Z4 - Road Test Specs

2009 BMW Z4 Convertible

(3.0L 6-cyl. Twin-turbo 6-speed Manual)


Model year2009
StyleS-Drive 35i 2dr Convertible (3.0L 6cyl Turbo 6M)
Base MSRP$52,475
Options on test vehiclePremium Package ($2,500 --includes power front seats, power lumbar, auto-dimming mirrors, universal garage opener, BMW Assist); Sport Package ($2,300 -- includes adaptive suspension, sport seats); Navigation System ($2,100 -- includes navigation system, iDrive electronics interface); Premium Sound Package ($2,000 -- includes premium hi-fi sound system, in-dash six-CD changer, iPod/USB audio jack); Cold Weather Package ($1,000 -- includes heated steering wheel, heated front seats, retractable headlight washers, trunk pass-through); Satellite Radio ($595); Metallic Paint ($550); Keyless Ignition/Entry ($500).
As-tested MSRP$64,020


Drive typeRear-wheel drive
Engine typeInline-6 with twin turbochargers and direct injection
Displacement (cc/cu-in)2,979cc (182 cu-in)
Block/head materialAluminum/aluminum
ValvetrainDouble overhead camshafts, four valves per cylinder, variable valve timing
Compression ratio (x:1)10.2:1
Redline (rpm)7,000
Horsepower (hp @ rpm)300 @ 5,800
Torque (lb-ft @ rpm)300 @ 1,400
Transmission type6-speed manual
Transmission and axle ratios (x:1)I = 4.06; II = 2.40; III = 1.58; IV = 1.19; V = 1.00; VI = 0.87; Final Drive = 3.08


Suspension, frontIndependent, MacPherson struts, coil springs and stabilizer bar
Suspension, rearIndependent, multilink, coil springs and stabilizer bar
Steering typeElectric power steering with variable-effort maps
Steering ratio (x:1)14.4:1
Tire brandBridgestone
Tire modelPotenza RE050A
Tire typeSummer performance, run-flat
Tire size, front225/40R18 88W
Tire size, rear255/35R18 90W
Wheel size18-by-8 inches front -- 18-by-8.5 inches rear
Wheel materialAluminum alloy
Brakes, front13.7-inch ventilated discs with single-piston sliding calipers
Brakes, rear12.8-inch ventilated discs with single-piston sliding calipers

Track Test Results

0-45 mph (sec.)3.6
0-60 mph (sec.)5.2
0-75 mph (sec.)7.7
1/4-mile (sec. @ mph)13.4 @ 103.7
0-60 with 1 foot of rollout (sec.)4.9
Braking, 30-0 mph (ft.)26
60-0 mph (ft.)106
Slalom, 6 x 100 ft. (mph)68.9 (67.4 with stability control on)
Skid pad, 200-ft. diameter (lateral g)0.87 (0.86 with stability control on)
Sound level @ idle (dB)47.9
@ Full throttle (dB)79.1
@ 70 mph cruise (dB)68.9

Test Driver Ratings & Comments

Acceleration commentsAs with all BMWs using this engine, the Z4 is hard to launch effectively. It wants to boil or bog. Get it right speedwise and there's lots of wheel hop, but it's quick.
Braking ratingExcellent
Braking commentsSolid, consistent pedal on all stops. Completely confidence-inspiring.
Handling ratingGood
Handling commentsSkid pad: Will not rotate regardless of throttle/steering inputs -- at the speeds reached on a 100-foot-radius skid pad, anyway. Just manage the understeer. Slalom: Very stable during high-speed transitions. Not sensitive to the bump at cone #3. Good information through controls, but not nimble in this maneuver.

Testing Conditions

Elevation (ft.)1,121
Temperature (°F)75.6
Wind (mph, direction)3.5 mph headwind

Fuel Consumption

EPA fuel economy (mpg)17 city/25 highway
Edmunds observed (mpg)19.2
Fuel tank capacity (U.S. gal.)14.5

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)3,450
Curb weight, as tested (lbs.)3,496
Weight distribution, as tested, f/r (%)49/51 (top up); 48/52 (top down)
Length (in.)166.9
Width (in.)70.5
Height (in.)50.8
Wheelbase (in.)98.3
Track, front (in.)59.5
Track, rear (in.)61.4
Turning circle (ft.)35.1
Legroom, front (in.)42.2
Headroom, front (in.)39.1
Shoulder room, front (in.)53.3
Seating capacity2
Cargo volume (cu-ft)10.9 (6.4 with top down)


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


Front airbagsStandard
Side airbagsStandard dual front with head protection chambers
Head airbagsNot available
Knee airbagsDual front
Antilock brakes4-wheel ABS
Electronic brake enhancementsBraking assist, electronic brakeforce distribution
Traction controlStandard
Stability controlStandard
Tire-pressure monitoring systemDirect tire-pressure monitoring
Emergency assistance systemNot available
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

New Car Buying Guides

See which cars and trucks our editors recommend