Car comparison

AUDI TT Roadster (8N) 1.8 TvsBMW Z4 (E85) 2.5i

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

New comparison

AUDI TT Roadster (8N)

1.8 T

225 hp1781 ccGasolineAWDManualTurbochargedRoadster1998-2000
VS

BMW Z4 (E85)

2.5i

192 hp2494 ccGasolineRWDManualNaturally aspiratedRoadster2002-2006

Comparison overview

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

Best choices

BMW Z4 (E85) 2.5i

  • Lightest
    1,335 kg
    2,943 lb
  • Lowest combined fuel consumption
    7.4 L/100 km
    31.8 mpg US
    38.2 mpg UK
  • Lowest city consumption
    10.4 L/100 km
    22.6 mpg US
    27.2 mpg UK
  • Lowest highway consumption
    5.7 L/100 km
    41.3 mpg US
    49.6 mpg UK
  • Best estimated range
    743 km
    462 mi
  • Largest trunk
    240 L
  • Best economy score
    87/100
  • Best practicality score
    30/100

AUDI TT Roadster (8N) 1.8 T

  • Quickest 0-100 km/h
    6.4 s
  • Fastest top speed
    243 km/h
    151 mph
  • Most powerful
    225 hp
    168 kW
  • Highest torque
    280 Nm
    207 lb-ft
  • Best power-to-weight
    153 hp/t
    114 kW/t
    6.6 kg/hp
  • Best overall score
    46/100
  • Best performance score
    55/100

Specification comparison

Specification comparison
ModelAUDITT Roadster (8N)1.8 TBMWZ4 (E85)2.5i
Power
225hp168kW
192hp143kW
Torque
280Nm207lb-ft
245Nm181lb-ft
Curb weight
1,475kg3,252lb
1,335kg2,943lb
Gross weight
1,775kg3,913lb
1,560kg3,439lb
Top speed
243 km/h
151 mph
235 km/h
146 mph
To 99% top speed
83.5s99% target: 241 km/h / 149 mph
Calculated
80.5s99% target: 233 km/h / 145 mph
Calculated
0-100 km/h
6.4s
7.0s
0-200 km/h
26.1s
Calculated
29.1s
Calculated
0-60 mph
6.1s
Calculated
6.6s
Calculated
Fuel consumption
9.4L/100 km25mpg US30.1mpg UK
7.4L/100 km31.8mpg US38.2mpg UK
Fuel consumption city
12.6L/100 km18.7mpg US22.4mpg UK
10.4L/100 km22.6mpg US27.2mpg UK
Fuel consumption highway
7.6L/100 km30.9mpg US37.2mpg UK
5.7L/100 km41.3mpg US49.6mpg UK
Quarter mile
14.5s
Calculated
15.0s
Calculated
Power-to-weight
153hp/t114kW/t69hp/1000 lb
Calculated
144hp/t107kW/t65hp/1000 lb
Calculated
Torque-to-weight
190Nm/t127lb-ft/ton
Calculated
184Nm/t123lb-ft/ton
Calculated
Estimated range
660km410mi
Calculated
743km462mi
Calculated
Displacement
1,781cc109cu in
2,494cc152cu in
Length
4,041mm159in
4,091mm161in
Width
1,764mm69in
1,781mm70in
Height
1,348mm53in
1,299mm51in
Wheelbase
2,429mm96in
2,495mm98in
Front track
1,528mm60in
1,473mm58in
Rear track
1,505mm59in
1,523mm60in
Trunk volume
180L
240L
Max trunk volume-
260L
Doors
2
2
Seats
2
2
Fuel tank
62L
55L
CO2 emissions
226g/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.

AUDI TT Roadster (8N) 1.8 TBMW Z4 (E85) 2.5iPowerTorque
  • AUDI TT Roadster (8N) 1.8 T: Power / Torque
  • BMW Z4 (E85) 2.5i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDITT Roadster (8N)1.8 T5,900 rpm2,200 rpm6,150 rpm
BMWZ4 (E85)2.5i6,000 rpm3,500 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDITT Roadster (8N)1.8 TBMWZ4 (E85)2.5i
Acceleration checkpoints
0-60 mph
0-97 km/h
6.1 s
6.6 s
0-100 km/h
0-62 mph
6.4 s
7.0 s
0-200 km/h
0-124 mph
26.1 s
29.1 s
Top speed
243 km/h
151 mph
235 km/h
146 mph
Drag race simulation
60 ft
18 m
2.4 s
2.5 s
330 ft
101 m
6.3 s
6.5 s
1/8 mile
201 m
9.5 s
9.8 s
1000 ft
305 m
12.2 s
12.6 s
1/4 mile
402 m
14.5 s
15.0 s
Trap speed
1/4 mile
402 m
158 km/h
98 mph
155 km/h
96 mph

Power comparison

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

Chart data table
VehicleValue
AUDITT Roadster (8N)1.8 T
225 hp
168 kW
BMWZ4 (E85)2.5i
192 hp
143 kW

AUDI TT Roadster (8N) 1.8 T has 33 hp more than BMW Z4 (E85) 2.5i.

The biggest power difference is between BMW Z4 (E85) 2.5i and AUDI TT Roadster (8N) 1.8 T: 33 hp (25 kW).

Torque comparison

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

Chart data table
VehicleValue
AUDITT Roadster (8N)1.8 T
280 Nm
207 lb-ft
BMWZ4 (E85)2.5i
245 Nm
181 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AUDITT Roadster (8N)1.8 T
1,475 kg
3,252 lb
BMWZ4 (E85)2.5i
1,335 kg
2,943 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
AUDITT Roadster (8N)1.8 T
243 km/h
151 mph
BMWZ4 (E85)2.5i
235 km/h
146 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
AUDITT Roadster (8N)1.8 T6.4 s
BMWZ4 (E85)2.5i7.0 s

The biggest 0-100 km/h difference is between AUDI TT Roadster (8N) 1.8 T and BMW Z4 (E85) 2.5i: 0.6 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
AUDITT Roadster (8N)1.8 T
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
BMWZ4 (E85)2.5i
7.4 L/100 km
31.8 mpg US
38.2 mpg UK

The biggest fuel consumption difference is between BMW Z4 (E85) 2.5i and AUDI TT Roadster (8N) 1.8 T: 2.0 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
AUDITT Roadster (8N)1.8 T
153 hp/t
114 kW/t
6.6 kg/hp
BMWZ4 (E85)2.5i
144 hp/t
107 kW/t
7.0 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
AUDITT Roadster (8N)1.8 T
660 km
410 mi
BMWZ4 (E85)2.5i
743 km
462 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDITT Roadster (8N)1.8 T
225 hp
168 kW
6.4 s
243 km/h
151 mph
BMWZ4 (E85)2.5i
192 hp
143 kW
7.0 s
235 km/h
146 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
AUDITT Roadster (8N)1.8 T
Power
225 hp
168 kW
0-100 km/h6.4 s
Top speed
243 km/h
151 mph
Doors/seats
2 doors
2 seats
Trunk
180 L
6.4 cu ft
Length
4,041 mm
159.1 in
Height
1,348 mm
53.1 in
BMWZ4 (E85)2.5i
Power
192 hp
143 kW
0-100 km/h7.0 s
Top speed
235 km/h
146 mph
Doors/seats
2 doors
2 seats
Trunk
240 L
8.5 cu ft
Length
4,091 mm
161.1 in
Height
1,299 mm
51.1 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
AUDITT Roadster (8N)1.8 T
Power
225 hp
168 kW
0-100 km/h6.4 s
Top speed
243 km/h
151 mph
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
BMWZ4 (E85)2.5i
Power
192 hp
143 kW
0-100 km/h7.0 s
Top speed
235 km/h
146 mph
7.4 L/100 km
31.8 mpg US
38.2 mpg UK

AUDI TT Roadster (8N) 1.8 T 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
AUDITT Roadster (8N)1.8 T
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
6.4 s
BMWZ4 (E85)2.5i
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
7.0 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
AUDITT Roadster (8N)1.8 T
153 hp/t
114 kW/t
6.6 kg/hp
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
BMWZ4 (E85)2.5i
144 hp/t
107 kW/t
7.0 kg/hp
7.4 L/100 km
31.8 mpg US
38.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDITT Roadster (8N)1.8 TBMWZ4 (E85)2.5i
Power
225 hp
168 kW
192 hp
143 kW
Torque
280 Nm
207 lb-ft
245 Nm
181 lb-ft
Acceleration
6.4 s
7.0 s
Top speed
243 km/h
151 mph
235 km/h
146 mph
Lightness
1,475 kg
3,252 lb
1,335 kg
2,943 lb
Fuel consumption
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
180 L
6.4 cu ft
Length
4,041 mm
159.1 in
Height
1,348 mm
53.1 in
Doors/seats
2 doors
2 seats
Trunk
240 L
8.5 cu ft
Length
4,091 mm
161.1 in
Height
1,299 mm
51.1 in
Range score
660 km
410 mi
743 km
462 mi
CO2 score
226 g/km
-
Trunk score
180 L
6.4 cu ft
240 L
8.5 cu ft
Power-to-weight score
153 hp/t
114 kW/t
6.6 kg/hp
144 hp/t
107 kW/t
7.0 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
VehicleAUDI TT Roadster (8N) 1.8 TBMW Z4 (E85) 2.5i
Consumption9.4 L/100 km25 mpg US30.1 mpg UK7.4 L/100 km31.8 mpg US38.2 mpg UK
Cost / 100 km16.45 LC100 km12.95 LC100 km
Cost / 100 mi26.47 LC100 mi20.84 LC100 mi
Annual fuel used1,410 L372 US gal310 UK gal1,110 L293 US gal244 UK gal
Annual fuel cost2,468 LC/year1,943 LC/year

Head-to-head comparisons

AUDI TT Roadster (8N) 1.8 T

  • Has 33 hp more
  • Has 35 Nm more
  • Is 0.6 s quicker from 0-100 km/h
  • Has 8 km/h (5 mph) higher top speed
  • Has 9 hp/t better power-to-weight

Pros

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

Cons

  • Highest combined fuel consumption
  • Heaviest
  • Smallest trunk

BMW Z4 (E85) 2.5i

  • Is 140 kg lighter
  • Uses 2.0 L/100 km less fuel
  • Has 84 km (52 mi) more estimated range
  • Has 60 L more trunk volume

Pros

  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
AUDI TT Roadster (8N) 1.8 T
BMW Z4 (E85) 2.5i
Compare selected cars
2 vehicles selected

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