Available new from: March 2018  -  April 2020

Scroll down for the full details of the BMW i8 Roadster right here. On this page, you will find all of the key specs for the BMW i8 Roadster from overall fuel efficiency in MPG and its top speed in MPH, to running costs, dimensions, data and lots more. With Parkers you'll find everything you need to know here – this is the most comprehensive source of car specs online.

BMW i8 Roadster (18-20)
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Power368 bhp
Top Speed155 mph
0-60 mph4.5 secs
Torque570 Nm, 420 ft-lb
Electric range10 miles
CO2 Emissions50 g/km
Euro Emissions Standard6
Miles Per Tank-


Miles per pound (mpp)Miles per pound*22.2 mpp
What is miles per pound (mpp)?
Used price range£52,665 - £82,430
See 2 used BMW i8 Roadster (18-20)s for sale, starting at £72,950
Fuel consumption
"Weighted" mpg figures Explanation
Plug-in hybrid fuel economy explained
Official fuel economy tests give a so-called "weighted" mpg for plugin hybrids (PHEVs). This attempts to account for the fact they can be driven either under petrol/diesel power, or under electric power.
The current test and calculation is far from perfect however, giving eyebrow-raising figures as high as 250mpg. Such high figures will not be even remotely achievable for owners who regularly rely on their PHEV's petrol or diesel engine.
For now, Parkers advice is to use weighted mpg only to compare the relative economy of PHEVs rather than to compare a PHEV with a petrol or diesel car. Thinking of weighted mpg as mpg in the conventional sense is unlikely to be informative.
128.4 mpg
Insurance group50
Annual road tax£480
Monthly company car tax cost (Basic Rate)£332 - £339
Monthly company car tax cost (Higher Rate)£665 - £678


Fuel Capacity42 litres
Turning Circle12m

Cabin & Luggage

Luggage Capacity-
Unbraked Towing Weight-
Braked Towing Weight-


Engine Size1499cc
Fuel TypePetrol/PlugIn Elec Hybrid
Gearbox6 Speed
Drivetrain4 wheel drive
*Where a range of mpp is shown the low figure relates to a version of this car fitted with all optional extras that reduce fuel economy; the high figure to a version fitted with no such options. A single figure indicates there are no options available that affect fuel economy. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs. Based on "Weighted" mpg; figures depend on the proportion of miles driven in pure electric mode and may vary widely.