BMW is debuting its i8 Roadster at the Los Angeles Auto Show, alongside an updated version of the i8 Coupe, writes Brian Byrne.
The electrically-operated roof can be folded in 15 seconds, and this can be carried out at speeds of up to 50km/h.
Like the i8 Coupe, much use is made of carbon-fibre and aluminium.
The upgrade has increased the range of the i8 Coupe to 55km on electric power alone. The 1.5 3-cylinder petrol engine generates up to 231hp on its own, while the combined hybrid output is rated at 374hp, allowing a 4.4s sprint to 100km/h.