Car comparison

BMW Z4 (E89) 30ivsAUDI TTS Roadster (8J) 2.0 TFSI

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 TTS Roadster (8J)

2.0 TFSI

272 hp1984 ccGasolineAWDAutomaticTurbochargedRoadster2008-2010

Comparison overview

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

Best choices

AUDI TTS Roadster (8J) 2.0 TFSI

  • Quickest 0-100 km/h
    5.5 s
  • Most powerful
    272 hp
    203 kW
  • Highest torque
    350 Nm
    258 lb-ft
  • Best power-to-weight
    182 hp/t
    136 kW/t
    5.5 kg/hp
  • Lowest combined fuel consumption
    7.9 L/100 km
    29.8 mpg US
    35.8 mpg UK
  • Lowest city consumption
    10.8 L/100 km
    21.8 mpg US
    26.2 mpg UK
  • Best estimated range
    759 km
    472 mi
  • Largest trunk
    250 L
  • Best overall score
    52/100
  • Best performance score
    62/100
  • Best economy score
    86/100
  • Best practicality score
    30/100

BMW Z4 (E89) 30i

  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,490 kg
    3,285 lb
  • Lowest highway consumption
    6.2 L/100 km
    37.9 mpg US
    45.6 mpg UK

Specification comparison

Specification comparison
ModelBMWZ4 (E89)30iAUDITTS Roadster (8J)2.0 TFSI
Power
258hp192kW
272hp203kW
Torque
315Nm232lb-ft
350Nm258lb-ft
Curb weight
1,490kg3,285lb
1,495kg3,296lb
Gross weight
1,745kg3,847lb
1,815kg4,001lb
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
69.6s99% target: 248 km/h / 154 mph
Calculated
0-100 km/h
5.8s
5.5s
0-200 km/h
20.5s
Calculated
20.7s
Calculated
0-60 mph
5.5s
Calculated
5.2s
Calculated
Fuel consumption
8.5L/100 km27.7mpg US33.2mpg UK
7.9L/100 km29.8mpg US35.8mpg UK
Fuel consumption city
12.4L/100 km19mpg US22.8mpg UK
10.8L/100 km21.8mpg US26.2mpg UK
Fuel consumption highway
6.2L/100 km37.9mpg US45.6mpg UK
6.2L/100 km37.9mpg US45.6mpg UK
Quarter mile
13.9s
Calculated
13.7s
Calculated
Power-to-weight
173hp/t129kW/t79hp/1000 lb
Calculated
182hp/t136kW/t83hp/1000 lb
Calculated
Torque-to-weight
211Nm/t141lb-ft/ton
Calculated
234Nm/t157lb-ft/ton
Calculated
Estimated range
647km402mi
Calculated
759km472mi
Calculated
Displacement
2,996cc183cu in
1,984cc121cu in
Length
4,239mm167in
4,198mm165in
Width
1,790mm70in
1,842mm73in
Height
1,291mm51in
1,350mm53in
Wheelbase
2,496mm98in
2,468mm97in
Front track
1,511mm59in
1,555mm61in
Rear track
1,537mm61in
1,546mm61in
Trunk volume
180L
250L
Max trunk volume
310L
-
Doors
2
2
Seats
2
2
Fuel tank
55L
60L
CO2 emissions-
184g/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 TTS Roadster (8J) 2.0 TFSIPowerTorque
  • BMW Z4 (E89) 30i: Power / Torque
  • AUDI TTS Roadster (8J) 2.0 TFSI: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ4 (E89)30i6,600 rpm2,500 rpm6,850 rpm
AUDITTS Roadster (8J)2.0 TFSI6,000 rpm2,500-5,000 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWZ4 (E89)30iAUDITTS Roadster (8J)2.0 TFSI
Acceleration checkpoints
0-60 mph
0-97 km/h
5.5 s
5.2 s
0-100 km/h
0-62 mph
5.8 s
5.5 s
0-200 km/h
0-124 mph
20.5 s
20.7 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
2.2 s
330 ft
101 m
6.1 s
5.9 s
1/8 mile
201 m
9.1 s
8.9 s
1000 ft
305 m
11.7 s
11.5 s
1/4 mile
402 m
13.9 s
13.7 s
Trap speed
1/4 mile
402 m
168 km/h
105 mph
169 km/h
105 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)30i
258 hp
192 kW
AUDITTS Roadster (8J)2.0 TFSI
272 hp
203 kW

AUDI TTS Roadster (8J) 2.0 TFSI has 14 hp more than BMW Z4 (E89) 30i.

The biggest power difference is between BMW Z4 (E89) 30i and AUDI TTS Roadster (8J) 2.0 TFSI: 14 hp (10 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
AUDITTS Roadster (8J)2.0 TFSI
350 Nm
258 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
AUDITTS Roadster (8J)2.0 TFSI
1,495 kg
3,296 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
AUDITTS Roadster (8J)2.0 TFSI
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
AUDITTS Roadster (8J)2.0 TFSI5.5 s

The biggest 0-100 km/h difference is between AUDI TTS Roadster (8J) 2.0 TFSI and BMW Z4 (E89) 30i: 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
AUDITTS Roadster (8J)2.0 TFSI
7.9 L/100 km
29.8 mpg US
35.8 mpg UK

The biggest fuel consumption difference is between AUDI TTS Roadster (8J) 2.0 TFSI and BMW Z4 (E89) 30i: 0.6 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
AUDITTS Roadster (8J)2.0 TFSI
182 hp/t
136 kW/t
5.5 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
AUDITTS Roadster (8J)2.0 TFSI
759 km
472 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
AUDITTS Roadster (8J)2.0 TFSI
272 hp
203 kW
5.5 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
AUDITTS Roadster (8J)2.0 TFSI
Power
272 hp
203 kW
0-100 km/h5.5 s
Top speed
250 km/h
155 mph
Doors/seats
2 doors
2 seats
Trunk
250 L
8.8 cu ft
Length
4,198 mm
165.3 in
Height
1,350 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)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
AUDITTS Roadster (8J)2.0 TFSI
Power
272 hp
203 kW
0-100 km/h5.5 s
Top speed
250 km/h
155 mph
7.9 L/100 km
29.8 mpg US
35.8 mpg UK

AUDI TTS Roadster (8J) 2.0 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)30i
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
5.8 s
AUDITTS Roadster (8J)2.0 TFSI
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
5.5 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
AUDITTS Roadster (8J)2.0 TFSI
182 hp/t
136 kW/t
5.5 kg/hp
7.9 L/100 km
29.8 mpg US
35.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ4 (E89)30iAUDITTS Roadster (8J)2.0 TFSI
Power
258 hp
192 kW
272 hp
203 kW
Torque
315 Nm
232 lb-ft
350 Nm
258 lb-ft
Acceleration
5.8 s
5.5 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
1,495 kg
3,296 lb
Fuel consumption
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
7.9 L/100 km
29.8 mpg US
35.8 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
4,198 mm
165.3 in
Height
1,350 mm
53.1 in
Range score
647 km
402 mi
759 km
472 mi
CO2 score
-
184 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
182 hp/t
136 kW/t
5.5 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 TTS Roadster (8J) 2.0 TFSI
Consumption8.5 L/100 km27.7 mpg US33.2 mpg UK7.9 L/100 km29.8 mpg US35.8 mpg UK
Cost / 100 km14.88 LC100 km13.83 LC100 km
Cost / 100 mi23.94 LC100 mi22.25 LC100 mi
Annual fuel used1,275 L337 US gal280 UK gal1,185 L313 US gal261 UK gal
Annual fuel cost2,231 LC/year2,074 LC/year

Head-to-head comparisons

BMW Z4 (E89) 30i

  • Is 5 kg lighter
  • Has 10 km/h (6 mph) higher top speed

Pros

  • Highest top speed
  • Lightest

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Smallest trunk

AUDI TTS Roadster (8J) 2.0 TFSI

  • Has 14 hp more
  • Has 35 Nm more
  • Is 0.3 s quicker from 0-100 km/h
  • Uses 0.6 L/100 km less fuel
  • Has 9 hp/t better power-to-weight
  • Has 112 km (70 mi) more estimated range
  • Has 70 L more trunk volume

Pros

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

Cons

  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z4 (E89) 30i
AUDI TTS Roadster (8J) 2.0 TFSI
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