Car comparison

BMW Z4 (G29) M40ivsAUDI TTS Roadster (8S) · Facelift 2018 2.0 TFSI

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

New comparison

BMW Z4 (G29)

M40i

340 hp2998 ccGasolineAWDAutomaticTurbochargedRoadster2018-2022
VS

AUDI TTS Roadster (8S) · Facelift 2018

2.0 TFSI

320 hp1984 ccGasolineAWDAutomaticTurbochargedRoadster2020-2023

Comparison overview

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

Best choices

BMW Z4 (G29) M40i

  • Quickest 0-100 km/h
    4.5 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    340 hp
    254 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Best power-to-weight
    221 hp/t
    165 kW/t
    4.5 kg/hp
  • Lowest combined fuel consumption
    7.4 L/100 km
    31.8 mpg US
    38.2 mpg UK
  • Best estimated range
    703 km
    437 mi
  • Largest trunk
    281 L
  • Best overall score
    60/100
  • Best performance score
    73/100
  • Best economy score
    87/100

Specification comparison

Specification comparison
ModelBMWZ4 (G29)M40iAUDITTS Roadster (8S)Facelift 20182.0 TFSI
Power
340hp254kW
320hp239kW
Torque
500Nm369lb-ft
400Nm295lb-ft
Curb weight
1,535kg3,384lb
1,510kg3,329lb
Gross weight
1,860kg4,101lb
1,805kg3,979lb
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
57.6s99% target: 262 km/h / 163 mph
Calculated
62.2s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.5s
4.8s
0-200 km/h
15.2s
Calculated
16.9s
Calculated
0-60 mph
4.3s
Calculated
4.6s
Calculated
Fuel consumption
7.4L/100 km31.8mpg US38.2mpg UK
8.6L/100 km27.4mpg US32.8mpg UK
Fuel consumption city
9.2L/100 km25.6mpg US30.7mpg UK
-
Fuel consumption highway
6.3L/100 km37.3mpg US44.8mpg UK
-
Quarter mile
12.6s
Calculated
12.9s
Calculated
Power-to-weight
221hp/t165kW/t100hp/1000 lb
Calculated
212hp/t158kW/t96hp/1000 lb
Calculated
Torque-to-weight
326Nm/t218lb-ft/ton
Calculated
265Nm/t177lb-ft/ton
Calculated
Estimated range
703km437mi
Calculated
640km397mi
Calculated
Displacement
2,998cc183cu in
1,984cc121cu in
Length
4,324mm170in
4,199mm165in
Width
1,864mm73in
1,832mm72in
Height
1,304mm51in
1,341mm53in
Wheelbase
2,470mm97in
2,505mm99in
Front track
1,594mm63in
1,568mm62in
Rear track
1,589mm63in
1,547mm61in
Ground clearance
114mm4in
-
Trunk volume
281L
280L
Doors
2
2
Seats
2
4
Fuel tank
52L
55L
CO2 emissions
168g/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) M40iAUDI TTS Roadster (8S) Facelift 2018 2.0 TFSIPowerTorque
  • BMW Z4 (G29) M40i: Power / Torque
  • AUDI TTS Roadster (8S) Facelift 2018 2.0 TFSI: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ4 (G29)M40i5,000-6,500 rpm1,600-4,500 rpm6,750 rpm
AUDITTS Roadster (8S)Facelift 20182.0 TFSI5,600-6,500 rpm2,000-5,600 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWZ4 (G29)M40iAUDITTS Roadster (8S)Facelift 20182.0 TFSI
Acceleration checkpoints
0-60 mph
0-97 km/h
4.3 s
4.6 s
0-100 km/h
0-62 mph
4.5 s
4.8 s
0-200 km/h
0-124 mph
15.2 s
16.9 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
Limited
Drag race simulation
60 ft
18 m
2.1 s
2.1 s
330 ft
101 m
5.5 s
5.6 s
1/8 mile
201 m
8.2 s
8.5 s
1000 ft
305 m
10.6 s
10.9 s
1/4 mile
402 m
12.6 s
12.9 s
Trap speed
1/4 mile
402 m
184 km/h
114 mph
178 km/h
111 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)M40i
340 hp
254 kW
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
320 hp
239 kW

BMW Z4 (G29) M40i has 20 hp more than AUDI TTS Roadster (8S) Facelift 2018 2.0 TFSI.

The biggest power difference is between AUDI TTS Roadster (8S) Facelift 2018 2.0 TFSI and BMW Z4 (G29) M40i: 20 hp (15 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)M40i
500 Nm
369 lb-ft
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
400 Nm
295 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)M40i
1,535 kg
3,384 lb
AUDITTS Roadster (8S)Facelift 20182.0 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 (G29)M40i
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDITTS Roadster (8S)Facelift 20182.0 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 (G29)M40i4.5 s
AUDITTS Roadster (8S)Facelift 20182.0 TFSI4.8 s

The biggest 0-100 km/h difference is between BMW Z4 (G29) M40i and AUDI TTS Roadster (8S) Facelift 2018 2.0 TFSI: 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 (G29)M40i
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
8.6 L/100 km
27.4 mpg US
32.8 mpg UK

The biggest fuel consumption difference is between BMW Z4 (G29) M40i and AUDI TTS Roadster (8S) Facelift 2018 2.0 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)M40i
221 hp/t
165 kW/t
4.5 kg/hp
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
212 hp/t
158 kW/t
4.7 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)M40i
703 km
437 mi
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
640 km
397 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ4 (G29)M40i
340 hp
254 kW
4.5 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
320 hp
239 kW
4.8 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 (G29)M40i
Power
340 hp
254 kW
0-100 km/h4.5 s
Top speed
Unrestricted
265 km/h165 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
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
Power
320 hp
239 kW
0-100 km/h4.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
280 L
9.9 cu ft
Length
4,199 mm
165.3 in
Height
1,341 mm
52.8 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)M40i
Power
340 hp
254 kW
0-100 km/h4.5 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
Power
320 hp
239 kW
0-100 km/h4.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
8.6 L/100 km
27.4 mpg US
32.8 mpg UK

BMW Z4 (G29) M40i 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)M40i
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
4.5 s
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
8.6 L/100 km
27.4 mpg US
32.8 mpg UK
4.8 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)M40i
221 hp/t
165 kW/t
4.5 kg/hp
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
AUDITTS Roadster (8S)Facelift 20182.0 TFSI
212 hp/t
158 kW/t
4.7 kg/hp
8.6 L/100 km
27.4 mpg US
32.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ4 (G29)M40iAUDITTS Roadster (8S)Facelift 20182.0 TFSI
Power
340 hp
254 kW
320 hp
239 kW
Torque
500 Nm
369 lb-ft
400 Nm
295 lb-ft
Acceleration
4.5 s
4.8 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,535 kg
3,384 lb
1,510 kg
3,329 lb
Fuel consumption
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
8.6 L/100 km
27.4 mpg US
32.8 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
4 seats
Trunk
280 L
9.9 cu ft
Length
4,199 mm
165.3 in
Height
1,341 mm
52.8 in
Range score
703 km
437 mi
640 km
397 mi
CO2 score
168 g/km
-
Trunk score
281 L
9.9 cu ft
280 L
9.9 cu ft
Power-to-weight score
221 hp/t
165 kW/t
4.5 kg/hp
212 hp/t
158 kW/t
4.7 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) M40iAUDI TTS Roadster (8S) Facelift 2018 2.0 TFSI
Consumption7.4 L/100 km31.8 mpg US38.2 mpg UK8.6 L/100 km27.4 mpg US32.8 mpg UK
Cost / 100 km12.95 LC100 km15.05 LC100 km
Cost / 100 mi20.84 LC100 mi24.22 LC100 mi
Annual fuel used1,110 L293 US gal244 UK gal1,290 L341 US gal284 UK gal
Annual fuel cost1,943 LC/year2,258 LC/year

Head-to-head comparisons

BMW Z4 (G29) M40i

  • Has 20 hp more
  • Has 100 Nm more
  • Is 0.3 s quicker from 0-100 km/h
  • Has 5 km/h (3 mph) higher top speed
  • Uses 1.2 L/100 km less fuel
  • Has 10 hp/t better power-to-weight
  • Has 63 km (39 mi) more estimated range
  • Has 1 L more trunk volume

Pros

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

Cons

  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z4 (G29) M40i
AUDI TTS Roadster (8S) 2.0 TFSI
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2 vehicles selected

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