Car comparison

BMW Z4 (E89) 30ivsAUDI TT Roadster (8J) 3.2i V6 24V

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

New comparison

BMW Z4 (E89)

30i

258 hp2996 ccGasolineRWDManualNaturally aspiratedRoadster2009-2011
VS

AUDI TT Roadster (8J)

3.2i V6 24V

250 hp3189 ccGasolineAWDManualNaturally aspiratedRoadster2006-2010

Comparison overview

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

Best choices

BMW Z4 (E89) 30i

  • Quickest 0-100 km/h
    5.8 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    258 hp
    192 kW
  • Best power-to-weight
    173 hp/t
    129 kW/t
    5.8 kg/hp
  • Lowest combined fuel consumption
    8.5 L/100 km
    27.7 mpg US
    33.2 mpg UK
  • Lowest city consumption
    12.4 L/100 km
    19.0 mpg US
    22.8 mpg UK
  • Lowest highway consumption
    6.2 L/100 km
    37.9 mpg US
    45.6 mpg UK
  • Best estimated range
    647 km
    402 mi
  • Best overall score
    50/100
  • Best performance score
    61/100
  • Best economy score
    84/100

Specification comparison

Specification comparison
ModelBMWZ4 (E89)30iAUDITT Roadster (8J)3.2i V6 24V
Power
258hp192kW
250hp186kW
Torque
315Nm232lb-ft
320Nm236lb-ft
Curb weight
1,490kg3,285lb
1,470kg3,241lb
Gross weight
1,745kg3,847lb
1,790kg3,946lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
250 km/h
155 mph
To 99% top speed
76.0s99% target: 257 km/h / 160 mph
Calculated
78.8s99% target: 248 km/h / 154 mph
Calculated
0-100 km/h
5.8s
6.1s
0-200 km/h
20.5s
Calculated
23.2s
Calculated
0-60 mph
5.5s
Calculated
5.8s
Calculated
Fuel consumption
8.5L/100 km27.7mpg US33.2mpg UK
10.4L/100 km22.6mpg US27.2mpg UK
Fuel consumption city
12.4L/100 km19mpg US22.8mpg UK
14.8L/100 km15.9mpg US19.1mpg UK
Fuel consumption highway
6.2L/100 km37.9mpg US45.6mpg UK
7.8L/100 km30.2mpg US36.2mpg UK
Quarter mile
13.9s
Calculated
14.2s
Calculated
Power-to-weight
173hp/t129kW/t79hp/1000 lb
Calculated
170hp/t127kW/t77hp/1000 lb
Calculated
Torque-to-weight
211Nm/t141lb-ft/ton
Calculated
218Nm/t146lb-ft/ton
Calculated
Estimated range
647km402mi
Calculated
577km358mi
Calculated
Displacement
2,996cc183cu in
3,189cc195cu in
Length
4,239mm167in
4,178mm164in
Width
1,790mm70in
1,842mm73in
Height
1,291mm51in
1,358mm53in
Wheelbase
2,496mm98in
2,468mm97in
Front track
1,511mm59in
1,572mm62in
Rear track
1,537mm61in
1,558mm61in
Trunk volume
180L
250L
Max trunk volume
310L
-
Doors
2
2
Seats
2
2
Fuel tank
55L
60L
CO2 emissions-
250g/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) 30iAUDI TT Roadster (8J) 3.2i V6 24VPowerTorque
  • BMW Z4 (E89) 30i: Power / Torque
  • AUDI TT Roadster (8J) 3.2i V6 24V: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ4 (E89)30i6,600 rpm2,500 rpm6,850 rpm
AUDITT Roadster (8J)3.2i V6 24V6,300 rpm2,800-3,200 rpm6,550 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWZ4 (E89)30iAUDITT Roadster (8J)3.2i V6 24V
Acceleration checkpoints
0-60 mph
0-97 km/h
5.5 s
5.8 s
0-100 km/h
0-62 mph
5.8 s
6.1 s
0-200 km/h
0-124 mph
20.5 s
23.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
250 km/h
155 mph
Drag race simulation
60 ft
18 m
2.3 s
2.3 s
330 ft
101 m
6.1 s
6.2 s
1/8 mile
201 m
9.1 s
9.3 s
1000 ft
305 m
11.7 s
12.0 s
1/4 mile
402 m
13.9 s
14.2 s
Trap speed
1/4 mile
402 m
168 km/h
105 mph
163 km/h
101 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)30i
258 hp
192 kW
AUDITT Roadster (8J)3.2i V6 24V
250 hp
186 kW

BMW Z4 (E89) 30i has 8 hp more than AUDI TT Roadster (8J) 3.2i V6 24V.

The biggest power difference is between AUDI TT Roadster (8J) 3.2i V6 24V and BMW Z4 (E89) 30i: 8 hp (6 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)30i
315 Nm
232 lb-ft
AUDITT Roadster (8J)3.2i V6 24V
320 Nm
236 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)30i
1,490 kg
3,285 lb
AUDITT Roadster (8J)3.2i V6 24V
1,470 kg
3,241 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)30i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
AUDITT Roadster (8J)3.2i V6 24V
250 km/h
155 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)30i5.8 s
AUDITT Roadster (8J)3.2i V6 24V6.1 s

The biggest 0-100 km/h difference is between BMW Z4 (E89) 30i and AUDI TT Roadster (8J) 3.2i V6 24V: 0.3 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)30i
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
AUDITT Roadster (8J)3.2i V6 24V
10.4 L/100 km
22.6 mpg US
27.2 mpg UK

The biggest fuel consumption difference is between BMW Z4 (E89) 30i and AUDI TT Roadster (8J) 3.2i V6 24V: 1.9 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)30i
173 hp/t
129 kW/t
5.8 kg/hp
AUDITT Roadster (8J)3.2i V6 24V
170 hp/t
127 kW/t
5.9 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)30i
647 km
402 mi
AUDITT Roadster (8J)3.2i V6 24V
577 km
358 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ4 (E89)30i
258 hp
192 kW
5.8 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
AUDITT Roadster (8J)3.2i V6 24V
250 hp
186 kW
6.1 s
250 km/h
155 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)30i
Power
258 hp
192 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
180 L
6.4 cu ft
Length
4,239 mm
166.9 in
Height
1,291 mm
50.8 in
AUDITT Roadster (8J)3.2i V6 24V
Power
250 hp
186 kW
0-100 km/h6.1 s
Top speed
250 km/h
155 mph
Doors/seats
2 doors
2 seats
Trunk
250 L
8.8 cu ft
Length
4,178 mm
164.5 in
Height
1,358 mm
53.5 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)30i
Power
258 hp
192 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
AUDITT Roadster (8J)3.2i V6 24V
Power
250 hp
186 kW
0-100 km/h6.1 s
Top speed
250 km/h
155 mph
10.4 L/100 km
22.6 mpg US
27.2 mpg UK

BMW Z4 (E89) 30i 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)30i
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
5.8 s
AUDITT Roadster (8J)3.2i V6 24V
10.4 L/100 km
22.6 mpg US
27.2 mpg UK
6.1 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)30i
173 hp/t
129 kW/t
5.8 kg/hp
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
AUDITT Roadster (8J)3.2i V6 24V
170 hp/t
127 kW/t
5.9 kg/hp
10.4 L/100 km
22.6 mpg US
27.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ4 (E89)30iAUDITT Roadster (8J)3.2i V6 24V
Power
258 hp
192 kW
250 hp
186 kW
Torque
315 Nm
232 lb-ft
320 Nm
236 lb-ft
Acceleration
5.8 s
6.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
250 km/h
155 mph
Lightness
1,490 kg
3,285 lb
1,470 kg
3,241 lb
Fuel consumption
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
10.4 L/100 km
22.6 mpg US
27.2 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
180 L
6.4 cu ft
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
4,178 mm
164.5 in
Height
1,358 mm
53.5 in
Range score
647 km
402 mi
577 km
358 mi
CO2 score
-
250 g/km
Trunk score
180 L
6.4 cu ft
250 L
8.8 cu ft
Power-to-weight score
173 hp/t
129 kW/t
5.8 kg/hp
170 hp/t
127 kW/t
5.9 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) 30iAUDI TT Roadster (8J) 3.2i V6 24V
Consumption8.5 L/100 km27.7 mpg US33.2 mpg UK10.4 L/100 km22.6 mpg US27.2 mpg UK
Cost / 100 km14.88 LC100 km18.20 LC100 km
Cost / 100 mi23.94 LC100 mi29.29 LC100 mi
Annual fuel used1,275 L337 US gal280 UK gal1,560 L412 US gal343 UK gal
Annual fuel cost2,231 LC/year2,730 LC/year

Head-to-head comparisons

BMW Z4 (E89) 30i

  • Has 8 hp more
  • Is 0.3 s quicker from 0-100 km/h
  • Has 10 km/h (6 mph) higher top speed
  • Uses 1.9 L/100 km less fuel
  • Has 3 hp/t better power-to-weight
  • Has 70 km (44 mi) more estimated range

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Best estimated range

Cons

  • Heaviest
  • Smallest trunk

AUDI TT Roadster (8J) 3.2i V6 24V

  • Has 5 Nm more
  • Is 20 kg lighter
  • Has 70 L more trunk volume

Pros

  • Highest torque
  • Lightest
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z4 (E89) 30i
AUDI TT Roadster (8J) 3.2i V6 24V
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