Guide to BMW i8 Specs, Engine, Top Speed, and Horsepower

BMWUX > Latest Hybrid Electric BMW i8 Price, Colors, and Design Guide > Guide to BMW i8 Specs, Engine, Top Speed, and Horsepower

The BMW Group has been notorious for producing cars with big engines, but the eco-friendly hybrid electric BMW i8 has given a whole new definition to BMW’s “sheer driving pleasure.” BMW came up with the plug-in hybrid, all-wheel-drive concept by combining the TwinPower Turbo technology developed for their infamous M models with the sustainable eDrive technology. Let’s explore BMW i8’s performance in detail.

BMW i8 Specs, Engine, Top Speed, and Horsepower Photo Gallery

BMW i8 Specs

BMW i8 Specs

The BMW i8 rocks a low stance, and the race-inspired 2+2 seater makes a striking impression. Weighing in at just 3,285 pounds, the BMW i8 measures at 184.6 inches in length, 76.5 inches in width, and 51 inches in height.

The suggestive proportion and power exhibition of the lengthy hood flows into the roofline and the rear overhang.  The enlarged wheelbase comes in at 110.2 inches fitting the 20-inch Light Alloy front and back wheels.  Composed of recycled, light, but sturdiest materials, the BMW i8 achieves a balanced weight distribution with a lowered center of gravity and enhanced safety.

BMW i8 Specs at a Glance

BMW i8 SpecsMeasurementsData
Engine type103
Transmission type6 Speed automatic (rear) / 2 Speed
Transmission typeautomatic (front)
No of Doors / Seats/2 / 4
Veh. lengthmm / inch4697 / 184.9
Veh. Widthmm / inch1942 / 76.5
Veh. heightmm / inch1291 / 50.8
Wheelbasemm / inch2800 / 110.2
Turning circlem / ft12.3 / 40.4
Ground clearancemm / inch117 / 4.6
Shoulder width front /mm / inch1440 / 56.7
Shoulder width rearmm / inch1260 / 49.6
Legroom frontmm / inch1095 / 43.1
Legroom rearmm / inch717 / 28.2
Max. headroom frontmm / inch983 / 38.7
Max. headroom rearmm / inch824 / 32.4
Luggage comp. capacitym³ / ft³0,154 / 4,7
Fuel tank capacityliter / gal42 / 11.1
Curb weight (US)Kg / lbs1567 / 3455
rear Weight distribution (empty car)Front % / Rear %48.8 / 51.2
Gross veh. weightKg / lbs1855 / 4090
PayloadKg / lbs281 / 620
Axle load limit frontKg / lbs896 / 1975
Axle load limit rearKg / lbs996 / 2195
Motor typeAC Synchronous Electric Motor
peak power EM1 bHP / at rpmbHP / 1/min129 / 4800
engine torque ft lbs EM1ft lbs184
Engine type / Cylinders / Valves p.cyl./ /in line, VANOS, Valvetronic / 3 / 4
CapacityCC/ inch³1498
Boreinch3.2
Strokeinch3.7
Engine power / at rpmbHP / 1/min228 / 5800
Engine torque / at rpmft lbs / 1/min236 / 3700
Compression rate / Fuel type ( recomm. ):1 /9.5 / Premium
Transmission Identification (front)GE2I12GK
1st gear ratio11.3
2nd gear5.85
Transmission (rear)AISIN F21-360 FT EOP
Gear ratios 1st gear4.459
2nd2.508
3rd1.556
4th1.142
5th0.851
6th0.672
Reverse gear3.185
Rear axle ratio3.683
Steering type / Steering ratio/ :1rack-and-pinion (EPS)/ 16
Front brake disc diameter / Rear brake disc diameterinch / inch13.4 / 13.0
Cd0.26
Top speedKm/h / mph250 / 155
Acceleration 0-60 mphs4.2
Acceleration 0-100Km/hs4.4
Fuel econ. combined Electricity + Gasoline (official EPA)mpge76
Fuel econ. combined Gasoline only (official EPA)mpg28
US total range (official EPA)miles330
Energy cons. combined (official EPA)kWh/100miles43
Front tires195/50 R20
Rear tires215/45 R20
Front wheels7J x 20 LM
Rear wheels7.5J x 20 LM
Track frontmm / inch1644 / 64.7
Track rearmm / inch1721 / 67.8
High voltage battery typeLithium-Ion
Battery capacitykWh5
Battery locationCentral tunnel, underbody
Charging time (220V Level 2, 32 A SAE J1722 Charger)Hours1.5 hrs @ 16 A

BMW i8 Horsepower (HP)

BMW i8 Specs Horsepower HP

The BMW i8 encompasses a total output of 357 HP, with 228 HP from the rear combustion engine and 129 HP from the front electric engine. It has an impressive 420 lb-ft of torque, of which 236 lb-ft is from the combustion engine, and 184 lb-ft is from the electric engine.

BMW i8 Top Speed

BMW i8 Specs Top Speed

The BMW i8’s top speed is at 155 mph, and it completes the 0-60 mph dash in just 4.2 seconds. That is only 0.1 seconds shy of the BMW M4 with the 6-Speed Manual Transmission.

BMW i8 MPG

BMW i8 Specs MPG

BMW i8 runs at a remarkable EPA estimated 76 MPG in hybrid mode with electric and gasoline engines combined. Under a casual driving condition, the BMW i8’s maximum combined driving range is up to an EPA estimated 330 miles with a full tank of gas and a fully charged battery.

BMW i8 Engine

BMW i8 Specs Engine

The BMW i8 focuses on performance, functionality, efficiency, and it drives as good as it looks. The BMW i8 is fitted with two unique engines – the combustion engine and the hybrid electric engine. The electric and the combustion engines are respectively located in the front and back of the i8 body structure.

In the BMW i8, the front wheels receive their power from the electric motor via a two-stage automatic transmission. The rear wheels, on the other hand, are driven by a gasoline engine via a 6-Speed Automatic Transmission. This is the perfect combination of efficiency and power. Let’s take a closer look at BMW i8’s unique engine arrangement.

BMW i8 Combustion Engine

BMW i8 Plug-in Hybrid Coupe Performance Combustion Engine

The i8 is fitted with a 1.5 Liter, 3-Cylinder Internal Combustion Engine. It produces 228 horsepower, which motorizes the rear axles. The engine is equipped with TwinPower Turbo technology based on the infamous BMW M Models.

The gasoline-fueled engine consists of a high-performance turbocharging system and direct high-precision gasoline injectors paired with VALVETRONIC Fully Variable Valve Control. The configuration comes with a 6-Speed Automatic Transmission and top speeds of approximately 75 MPH. The BMW i8 running on the combustion engine alone is rated at approximately 28 MPG.

BMW i8 Hybrid Electric Engine

BMW i8 Plug-in Hybrid Coupe Performance Electric Engine

The eDrive hybrid electric motor is exclusively developed for the BMW i8. The motor produces a maximum of 129 horsepower, top speed is at 75 mph and can run the vehicle independently through a lithium-ion high-voltage battery with liquid cooling.

The advantage of the electric motor is the instant and consistent availability of power from zero to any range of RPM. The electric motor provides added boost of power surges to the combustion engine during acceleration.

The capacity of the electric motor and battery are designed to ensure that the i8 can run and maximize efficiency on electric power alone. The BMW i8’s maximum driving range in the all-electric mode is up to an approximated 22 miles (right… because it is not the same concept as a Tesla).

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