Car comparison

BMW Z4 (E89) 35ivsAUDI TT RS Roadster (8J) 2.5 TFSI

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

New comparison

BMW Z4 (E89)

35i

306 hp2979 ccGasolineRWDAutomaticTurbochargedRoadster2009-2013
VS

AUDI TT RS Roadster (8J)

2.5 TFSI

340 hp2480 ccGasolineAWDManualTurbochargedRoadster2009-2010

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Best choices

AUDI TT RS Roadster (8J) 2.5 TFSI

  • Quickest 0-100 km/h
    4.7 s
  • Most powerful
    340 hp
    254 kW
  • Highest torque
    450 Nm
    332 lb-ft
  • Lightest
    1,510 kg
    3,329 lb
  • Best power-to-weight
    225 hp/t
    168 kW/t
    4.4 kg/hp
  • Best estimated range
    632 km
    392 mi
  • Best overall score
    58/100
  • Best performance score
    71/100

BMW Z4 (E89) 35i

  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lowest combined fuel consumption
    9.0 L/100 km
    26.1 mpg US
    31.4 mpg UK
  • Lowest city consumption
    12.6 L/100 km
    18.7 mpg US
    22.4 mpg UK
  • Lowest highway consumption
    6.9 L/100 km
    34.1 mpg US
    40.9 mpg UK
  • Lowest CO2 emissions
    210 g/km
  • Best economy score
    83/100
  • Best practicality score
    32/100

Specification comparison

Specification comparison
ModelBMWZ4 (E89)35iAUDITT RS Roadster (8J)2.5 TFSI
Power
306hp228kW
340hp254kW
Torque
400Nm295lb-ft
450Nm332lb-ft
Curb weight
1,600kg3,527lb
1,510kg3,329lb
Gross weight
1,855kg4,090lb
1,830kg4,034lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
67.9s99% target: 262 km/h / 163 mph
Calculated
61.0s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.1s
4.7s
0-200 km/h
17.6s
Calculated
16.6s
Calculated
0-60 mph
4.9s
Calculated
4.5s
Calculated
Fuel consumption
9L/100 km26.1mpg US31.4mpg UK
9.5L/100 km24.8mpg US29.7mpg UK
Fuel consumption city
12.6L/100 km18.7mpg US22.4mpg UK
13.3L/100 km17.7mpg US21.2mpg UK
Fuel consumption highway
6.9L/100 km34.1mpg US40.9mpg UK
7.2L/100 km32.7mpg US39.2mpg UK
Quarter mile
13.2s
Calculated
12.8s
Calculated
Power-to-weight
191hp/t143kW/t87hp/1000 lb
Calculated
225hp/t168kW/t102hp/1000 lb
Calculated
Torque-to-weight
250Nm/t167lb-ft/ton
Calculated
298Nm/t199lb-ft/ton
Calculated
Estimated range
611km380mi
Calculated
632km392mi
Calculated
Displacement
2,979cc182cu in
2,480cc151cu in
Length
4,239mm167in
4,198mm165in
Width
1,790mm70in
1,842mm73in
Height
1,291mm51in
1,348mm53in
Wheelbase
2,496mm98in
2,468mm97in
Front track
1,511mm59in
1,555mm61in
Rear track
1,559mm61in
1,546mm61in
Trunk volume-
250L
Doors
2
2
Seats
2
2
Fuel tank
55L
60L
CO2 emissions
210g/km
221g/km

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

BMW Z4 (E89) 35iAUDI TT RS Roadster (8J) 2.5 TFSIPowerTorque
  • BMW Z4 (E89) 35i: Power / Torque
  • AUDI TT RS Roadster (8J) 2.5 TFSI: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ4 (E89)35i5,800 rpm1,300-5,000 rpm6,050 rpm
AUDITT RS Roadster (8J)2.5 TFSI5,400-6,500 rpm1,600-6,500 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWZ4 (E89)35iAUDITT RS Roadster (8J)2.5 TFSI
Acceleration checkpoints
0-60 mph
0-97 km/h
4.9 s
4.5 s
0-100 km/h
0-62 mph
5.1 s
4.7 s
0-200 km/h
0-124 mph
17.6 s
16.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.2 s
2.1 s
330 ft
101 m
5.8 s
5.6 s
1/8 mile
201 m
8.7 s
8.4 s
1000 ft
305 m
11.1 s
10.8 s
1/4 mile
402 m
13.2 s
12.8 s
Trap speed
1/4 mile
402 m
176 km/h
109 mph
179 km/h
112 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
VehicleValue
BMWZ4 (E89)35i
306 hp
228 kW
AUDITT RS Roadster (8J)2.5 TFSI
340 hp
254 kW

AUDI TT RS Roadster (8J) 2.5 TFSI has 34 hp more than BMW Z4 (E89) 35i.

The biggest power difference is between BMW Z4 (E89) 35i and AUDI TT RS Roadster (8J) 2.5 TFSI: 34 hp (25 kW).

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
VehicleValue
BMWZ4 (E89)35i
400 Nm
295 lb-ft
AUDITT RS Roadster (8J)2.5 TFSI
450 Nm
332 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
VehicleValue
BMWZ4 (E89)35i
1,600 kg
3,527 lb
AUDITT RS Roadster (8J)2.5 TFSI
1,510 kg
3,329 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
BMWZ4 (E89)35i
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDITT RS Roadster (8J)2.5 TFSI
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
BMWZ4 (E89)35i5.1 s
AUDITT RS Roadster (8J)2.5 TFSI4.7 s

The biggest 0-100 km/h difference is between AUDI TT RS Roadster (8J) 2.5 TFSI and BMW Z4 (E89) 35i: 0.4 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
BMWZ4 (E89)35i
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
AUDITT RS Roadster (8J)2.5 TFSI
9.5 L/100 km
24.8 mpg US
29.7 mpg UK

The biggest fuel consumption difference is between BMW Z4 (E89) 35i and AUDI TT RS Roadster (8J) 2.5 TFSI: 0.5 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
BMWZ4 (E89)35i
191 hp/t
143 kW/t
5.2 kg/hp
AUDITT RS Roadster (8J)2.5 TFSI
225 hp/t
168 kW/t
4.4 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
VehicleValue
BMWZ4 (E89)35i
611 km
380 mi
AUDITT RS Roadster (8J)2.5 TFSI
632 km
392 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ4 (E89)35i
306 hp
228 kW
5.1 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDITT RS Roadster (8J)2.5 TFSI
340 hp
254 kW
4.7 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Chart data table
VehiclePerformance scorePracticality score
BMWZ4 (E89)35i
Power
306 hp
228 kW
0-100 km/h5.1 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk-
Length
4,239 mm
166.9 in
Height
1,291 mm
50.8 in
AUDITT RS Roadster (8J)2.5 TFSI
Power
340 hp
254 kW
0-100 km/h4.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
250 L
8.8 cu ft
Length
4,198 mm
165.3 in
Height
1,348 mm
53.1 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
BMWZ4 (E89)35i
Power
306 hp
228 kW
0-100 km/h5.1 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
AUDITT RS Roadster (8J)2.5 TFSI
Power
340 hp
254 kW
0-100 km/h4.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
9.5 L/100 km
24.8 mpg US
29.7 mpg UK

AUDI TT RS Roadster (8J) 2.5 TFSI is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
VehicleFuel consumption, L/100 km0-100 km/h, s
BMWZ4 (E89)35i
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
5.1 s
AUDITT RS Roadster (8J)2.5 TFSI
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
4.7 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
BMWZ4 (E89)35i
191 hp/t
143 kW/t
5.2 kg/hp
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
AUDITT RS Roadster (8J)2.5 TFSI
225 hp/t
168 kW/t
4.4 kg/hp
9.5 L/100 km
24.8 mpg US
29.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ4 (E89)35iAUDITT RS Roadster (8J)2.5 TFSI
Power
306 hp
228 kW
340 hp
254 kW
Torque
400 Nm
295 lb-ft
450 Nm
332 lb-ft
Acceleration
5.1 s
4.7 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,600 kg
3,527 lb
1,510 kg
3,329 lb
Fuel consumption
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk-
Length
4,239 mm
166.9 in
Height
1,291 mm
50.8 in
Doors/seats
2 doors
2 seats
Trunk
250 L
8.8 cu ft
Length
4,198 mm
165.3 in
Height
1,348 mm
53.1 in
Range score
611 km
380 mi
632 km
392 mi
CO2 score
210 g/km
221 g/km
Trunk score
-
250 L
8.8 cu ft
Power-to-weight score
191 hp/t
143 kW/t
5.2 kg/hp
225 hp/t
168 kW/t
4.4 kg/hp
Overall
Fixed score
Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.

LC = Local Currency

Fuel cost and annual usage
VehicleBMW Z4 (E89) 35iAUDI TT RS Roadster (8J) 2.5 TFSI
Consumption9 L/100 km26.1 mpg US31.4 mpg UK9.5 L/100 km24.8 mpg US29.7 mpg UK
Cost / 100 km15.75 LC100 km16.63 LC100 km
Cost / 100 mi25.35 LC100 mi26.76 LC100 mi
Annual fuel used1,350 L357 US gal297 UK gal1,425 L376 US gal313 UK gal
Annual fuel cost2,363 LC/year2,494 LC/year

Head-to-head comparisons

BMW Z4 (E89) 35i

  • Has 5 km/h (3 mph) higher top speed
  • Uses 0.5 L/100 km less fuel
  • Emits 11 g/km less CO2

Pros

  • Highest top speed
  • Lowest combined fuel consumption

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Heaviest

AUDI TT RS Roadster (8J) 2.5 TFSI

  • Has 34 hp more
  • Has 50 Nm more
  • Is 90 kg lighter
  • Is 0.4 s quicker from 0-100 km/h
  • Has 34 hp/t better power-to-weight
  • Has 20 km (13 mi) more estimated range

Pros

  • Quickest 0-100 km/h in this comparison
  • Most powerful
  • Highest torque
  • Lightest
  • Best power-to-weight ratio
  • Best estimated range

Cons

  • Highest combined fuel consumption
  • Lowest top speed
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z4 (E89) 35i
AUDI TT RS Roadster (8J) 2.5 TFSI
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2 vehicles selected

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