BMW i8 Roadster Add To Compare Remove From Compare Vehicle Description Contact The i8 Roadster takes all the coupe’s futuristic features and tops them off with a slinkier body and a folding fabric roof. It’s more expensive, however, and has two seats instead of four The BMW i8 Roadster is a convertible version of the futuristic i8 Coupe. It packs supercar-like performance into an eye-catching package that’s sure to attract even more attention at the local petrol station than the likes of the Honda NSX and Audi R8 Spyder. Not that you’ll need to refuel the i8 Roadster very often – it is a hybrid after all. Fully charge its batteries (which you can do in three hours using a dedicated wall charger) and you can drive for around 30 miles in electric-only mode. When the batteries have run out of juice – or put your foot down to accelerate hard – the 1.5-litre turbo petrol engine starts up instantly to lend a hand. Together, they produce 374hp – enough to sprint the i8 Roadster from 0-62mph in 4.6 seconds and on to a 155mph top speed. In Sport mode, the petrol engine stays running the whole time which helps make the BMW feel even more responsive on a twisty country road. As an added bonus, it also re-charges the batteries on the move and produces some sporty crackles and wooshes that sound terrific – especially with the roof down. If it starts raining, don’t worry – you can raise the roof electrically at up to 30mph. It does an excellent job of muting any unpleasant wind noise at motorway speeds and leaves enough headroom inside for you to get comfortable, even if you’re over six-feet tall.