Car comparison

BMW Z4 (G29) 30ivsAUDI TT Roadster (8S) · Facelift 2018 45 TFSI

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

New comparison

BMW Z4 (G29)

30i

258 hp1998 ccGasolineRWDAutomaticTurbochargedRoadster2018-2022
VS

AUDI TT Roadster (8S) · Facelift 2018

45 TFSI

245 hp1984 ccGasolineAWDAutomaticTurbochargedRoadster2018-2023

Comparison overview

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

Best choices

BMW Z4 (G29) 30i

  • Quickest 0-100 km/h
    5.4 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    258 hp
    192 kW
  • Highest torque
    400 Nm
    295 lb-ft
  • Lightest
    1,415 kg
    3,120 lb
  • Best power-to-weight
    182 hp/t
    136 kW/t
    5.5 kg/hp
  • Lowest combined fuel consumption
    6.1 L/100 km
    38.6 mpg US
    46.3 mpg UK
  • Lowest city consumption
    7.4 L/100 km
    31.8 mpg US
    38.2 mpg UK
  • Lowest highway consumption
    5.3 L/100 km
    44.4 mpg US
    53.3 mpg UK
  • Lowest CO2 emissions
    139 g/km
  • Best estimated range
    852 km
    530 mi
  • Best overall score
    54/100
  • Best performance score
    65/100
  • Best economy score
    90/100
  • Best practicality score
    32/100

Specification comparison

Specification comparison
ModelBMWZ4 (G29)30iAUDITT Roadster (8S)Facelift 201845 TFSI
Power
258hp192kW
245hp183kW
Torque
400Nm295lb-ft
370Nm273lb-ft
Curb weight
1,415kg3,120lb
1,530kg3,373lb
Gross weight
1,740kg3,836lb
1,810kg3,990lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
250 km/h
155 mph
To 99% top speed
67.9s99% target: 257 km/h / 160 mph
Calculated
71.2s99% target: 248 km/h / 154 mph
Calculated
0-100 km/h
5.4s
5.5s
0-200 km/h
18.7s
Calculated
20.9s
Calculated
0-60 mph
5.1s
Calculated
5.2s
Calculated
Fuel consumption
6.1L/100 km38.6mpg US46.3mpg UK
7.3L/100 km32.2mpg US38.7mpg UK
Fuel consumption city
7.4L/100 km31.8mpg US38.2mpg UK
9.2L/100 km25.6mpg US30.7mpg UK
Fuel consumption highway
5.3L/100 km44.4mpg US53.3mpg UK
6.2L/100 km37.9mpg US45.6mpg UK
Quarter mile
13.5s
Calculated
13.7s
Calculated
Power-to-weight
182hp/t136kW/t83hp/1000 lb
Calculated
160hp/t119kW/t73hp/1000 lb
Calculated
Torque-to-weight
283Nm/t189lb-ft/ton
Calculated
242Nm/t162lb-ft/ton
Calculated
Estimated range
852km530mi
Calculated
616km383mi
Calculated
Displacement
1,998cc122cu in
1,984cc121cu in
Length
4,324mm170in
4,191mm165in
Width
1,864mm73in
1,832mm72in
Height
1,304mm51in
1,355mm53in
Wheelbase
2,470mm97in
2,505mm99in
Front track
1,609mm63in
1,572mm62in
Rear track
1,616mm64in
1,552mm61in
Ground clearance
117mm5in
-
Trunk volume
281L
-
Doors
2
2
Seats
2
2
Fuel tank
52L
45L
CO2 emissions
139g/km
166g/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 (G29) 30iAUDI TT Roadster (8S) Facelift 2018 45 TFSIPowerTorque
  • BMW Z4 (G29) 30i: Power / Torque
  • AUDI TT Roadster (8S) Facelift 2018 45 TFSI: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ4 (G29)30i5,000-6,500 rpm1,550-4,400 rpm6,750 rpm
AUDITT Roadster (8S)Facelift 201845 TFSI5,000-6,700 rpm1,600-4,300 rpm6,950 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWZ4 (G29)30iAUDITT Roadster (8S)Facelift 201845 TFSI
Acceleration checkpoints
0-60 mph
0-97 km/h
5.1 s
5.2 s
0-100 km/h
0-62 mph
5.4 s
5.5 s
0-200 km/h
0-124 mph
18.7 s
20.9 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
5.9 s
5.9 s
1/8 mile
201 m
8.9 s
8.9 s
1000 ft
305 m
11.4 s
11.5 s
1/4 mile
402 m
13.5 s
13.7 s
Trap speed
1/4 mile
402 m
173 km/h
108 mph
168 km/h
104 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)30i
258 hp
192 kW
AUDITT Roadster (8S)Facelift 201845 TFSI
245 hp
183 kW

BMW Z4 (G29) 30i has 13 hp more than AUDI TT Roadster (8S) Facelift 2018 45 TFSI.

The biggest power difference is between AUDI TT Roadster (8S) Facelift 2018 45 TFSI and BMW Z4 (G29) 30i: 13 hp (10 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)30i
400 Nm
295 lb-ft
AUDITT Roadster (8S)Facelift 201845 TFSI
370 Nm
273 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)30i
1,415 kg
3,120 lb
AUDITT Roadster (8S)Facelift 201845 TFSI
1,530 kg
3,373 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 (G29)30i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
AUDITT Roadster (8S)Facelift 201845 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 (G29)30i5.4 s
AUDITT Roadster (8S)Facelift 201845 TFSI5.5 s

The biggest 0-100 km/h difference is between BMW Z4 (G29) 30i and AUDI TT Roadster (8S) Facelift 2018 45 TFSI: 0.1 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 (G29)30i
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
AUDITT Roadster (8S)Facelift 201845 TFSI
7.3 L/100 km
32.2 mpg US
38.7 mpg UK

The biggest fuel consumption difference is between BMW Z4 (G29) 30i and AUDI TT Roadster (8S) Facelift 2018 45 TFSI: 1.2 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 (G29)30i
182 hp/t
136 kW/t
5.5 kg/hp
AUDITT Roadster (8S)Facelift 201845 TFSI
160 hp/t
119 kW/t
6.2 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)30i
852 km
530 mi
AUDITT Roadster (8S)Facelift 201845 TFSI
616 km
383 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ4 (G29)30i
258 hp
192 kW
5.4 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
AUDITT Roadster (8S)Facelift 201845 TFSI
245 hp
183 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 (G29)30i
Power
258 hp
192 kW
0-100 km/h5.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
281 L
9.9 cu ft
Length
4,324 mm
170.2 in
Height
1,304 mm
51.3 in
AUDITT Roadster (8S)Facelift 201845 TFSI
Power
245 hp
183 kW
0-100 km/h5.5 s
Top speed
250 km/h
155 mph
Doors/seats
2 doors
2 seats
Trunk-
Length
4,191 mm
165.0 in
Height
1,355 mm
53.3 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 (G29)30i
Power
258 hp
192 kW
0-100 km/h5.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
AUDITT Roadster (8S)Facelift 201845 TFSI
Power
245 hp
183 kW
0-100 km/h5.5 s
Top speed
250 km/h
155 mph
7.3 L/100 km
32.2 mpg US
38.7 mpg UK

BMW Z4 (G29) 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 (G29)30i
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
5.4 s
AUDITT Roadster (8S)Facelift 201845 TFSI
7.3 L/100 km
32.2 mpg US
38.7 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 (G29)30i
182 hp/t
136 kW/t
5.5 kg/hp
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
AUDITT Roadster (8S)Facelift 201845 TFSI
160 hp/t
119 kW/t
6.2 kg/hp
7.3 L/100 km
32.2 mpg US
38.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ4 (G29)30iAUDITT Roadster (8S)Facelift 201845 TFSI
Power
258 hp
192 kW
245 hp
183 kW
Torque
400 Nm
295 lb-ft
370 Nm
273 lb-ft
Acceleration
5.4 s
5.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
250 km/h
155 mph
Lightness
1,415 kg
3,120 lb
1,530 kg
3,373 lb
Fuel consumption
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
7.3 L/100 km
32.2 mpg US
38.7 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
281 L
9.9 cu ft
Length
4,324 mm
170.2 in
Height
1,304 mm
51.3 in
Doors/seats
2 doors
2 seats
Trunk-
Length
4,191 mm
165.0 in
Height
1,355 mm
53.3 in
Range score
852 km
530 mi
616 km
383 mi
CO2 score
139 g/km
166 g/km
Trunk score
281 L
9.9 cu ft
-
Power-to-weight score
182 hp/t
136 kW/t
5.5 kg/hp
160 hp/t
119 kW/t
6.2 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 (G29) 30iAUDI TT Roadster (8S) Facelift 2018 45 TFSI
Consumption6.1 L/100 km38.6 mpg US46.3 mpg UK7.3 L/100 km32.2 mpg US38.7 mpg UK
Cost / 100 km10.67 LC100 km12.78 LC100 km
Cost / 100 mi17.18 LC100 mi20.56 LC100 mi
Annual fuel used915 L242 US gal201 UK gal1,095 L289 US gal241 UK gal
Annual fuel cost1,601 LC/year1,916 LC/year

Head-to-head comparisons

BMW Z4 (G29) 30i

  • Has 13 hp more
  • Has 30 Nm more
  • Is 115 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Has 10 km/h (6 mph) higher top speed
  • Uses 1.2 L/100 km less fuel
  • Has 22 hp/t better power-to-weight
  • Has 236 km (147 mi) more estimated range
  • Emits 27 g/km less CO2

Pros

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z4 (G29) 30i
AUDI TT Roadster (8S) 45 TFSI
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BMW Z4 (G29) 30i vs AUDI TT Roadster (8S) · Facelift 2018 45 TFSI - car comparison - FastVsFaster