The Comparative Analysis :

BMW i8 Roadster (18 - ..) vs. Mercedes AMG GT S Roadster SPEEDSHIFT DCT (18 - 18)

€ 155,000
BMW i8 Roadster (18 - ..) BMW i8 Roadster
€ 148,800
 Mercedes AMG GT S Roadster SPEEDSHIFT DCT (18 - 18) Mercedes AMG GT S Roadster
€ 155,000
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 148,800

ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info

Vehicle Dimensions

The BMW i8 Roadster is slightly bigger in every dimension. It's 5.7 inches longer, 0.1 inches wider and 1.2 inches taller than the Mercedes AMG GT S Roadster.
BMW i8 Roadster
Mercedes AMG GT S Roadster
50.7
Blueprint BMW i8 Roadster (18 - ..)
76.5
87.3
49.6
Blueprint Mercedes AMG GT S Roadster SPEEDSHIFT DCT (18 - 18)
76.3
81.7
76.5 in
Width
76.3 in
87.3 in
Width Incl. Mirrors
81.7 in
50.7 in
Height
49.6 in
Blueprint BMW i8 Roadster (18 - ..)
110.2
184.6
Blueprint Mercedes AMG GT S Roadster SPEEDSHIFT DCT (18 - 18)
103.5
178.9
184.6 in
Length
178.9 in
110.2 in
Wheelbase
103.5 in

Vehicle Weight

BMW i8 Roadster
Mercedes AMG GT S Roadster
3682 lb
Curb Weight
3825 lb
4332 lb
Gross Vehicle
Weight
4277 lb
BMW i8 Roadster (18 - ..)
Weight Difference:
143 lb
3.74 %
Mercedes AMG GT S Roadster SPEEDSHIFT DCT (18 - 18)

General

BMW i8 Roadster
Mercedes AMG GT S Roadster
I15
Generation
C190
Roadster
Car Body Style
Roadster
Premium Unleaded
Fuel Type
Premium Unleaded
On-demand four-wheel drive (4WD) with automatic engagement
Drivetrain
Rear-wheel drive
6-speed automatic transmission
Transmission
7-speed dual clutch transmission

Engine

BMW i8 Roadster
Mercedes AMG GT S Roadster
3-cylinder plug-in hybrid gasoline engine with tur­bo­charger
Engine Type
V8 gasoline engine with two tur­bo­chargers (bi­turbo)
BMW B38
Engine Series
Mercedes-Benz M 178
B38-K15
Engine Code
M 178.980
4
Valves
4
3
Cylinders
8
1.5 L / 73 cu in
Displacement
4 L / 196 cu in
369 hp
at 5800 rpm
Power
515 hp
at 6250 rpm
BMW i8 Roadster
369 hp
515 hp
Mercedes AMG GT S Roadster
420 lb‑ft
at 3700 rpm
Max. Torque
494 lb‑ft
at 1900 rpm
BMW i8 Roadster
420 lb‑ft
494 lb‑ft
Mercedes AMG GT S Roadster

Performance

BMW i8 Roadster
Mercedes AMG GT S Roadster
155 mph
Maximum Speed
191 mph
4.6 sec
Acceleration 0 to 62 mph
3.8 sec
62 mph 62
mph

210 ft
0.000 sec

BMW i8 Roadster

62 mph 62
mph

174 ft
0.000 sec

Mercedes AMG GT S Roadster

▶ REPLAY
9.98 lb/hp
Weight-to-Power Ratio
7.43 lb/hp
BMW i8 Roadster
9.98 lb/hp
7.43 lb/hp
Mercedes AMG GT S Roadster

Fuel Economy / Emissions

BMW i8 Roadster
Mercedes AMG GT S Roadster
Fuel Economy
118 mpg
combined
20 mpg
BMW i8 Roadster
118 mpg
20 mpg
Mercedes AMG GT S Roadster
No data
city
15 mpg
No data
highway
26 mpg
Kraftstoffanzeige
7.9 gal
Fuel Tank Capacity
17.2 gal
Kraftstoffanzeige
932 mi
Range
351 mi
BMW i8 Roadster
932 mi
351 mi
Mercedes AMG GT S Roadster
Environmental Impact
37.8 kWh
Total Energy Consumption
per 100 miles ⓘThe total energy consumption per 100 miles is the amount of energy consumed by a vehicle when burning fuel or using electricity per 100 miles (final energy), and the energy required to produce the appropriate amount of fuel or electricity (primary energy).
217.9 kWh
BMW i8 Roadster
37.8 kWh
217.9 kWh
Mercedes AMG GT S Roadster
Euro 6d-TEMP-EVAP (WLTP)
Emission Standard
Euro 6d-TEMP (WLTP) 36AG-AI
80 g/mi (WLTP)
CO2 Emissions
446 g/mi (WLTP)

Practical Convenience

BMW i8 Roadster
Mercedes AMG GT S Roadster
3
Doors
2
2
No. of Seats
2
650 lb
Maximum Payload
452 lb
2.5 cu ft
Trunk Volume
4.7 cu ft
No data
Cargo Volume (Seats Down)
No data