Its impact on the Frankfurt motor show was considerable - it's not every day you see a sports coupe hiding a plug-in hybrid system under its bodywork.
Pricing has not been announced, but a BMW representative told us the i8 Roadster will start "north of $150,000". For starters, the thanks to the i8's light, strong and rigid carbonfibre tub construction the soft top i8 is only 60kg heavier than the Coupe at 1595kg. In total, the i8 gets an additional 12 hp, up to 369 hp. This means 0-60 miles per hour (0-92 k/h) times of 4.2 seconds for the Coupe and 4.4 seconds for the Roadster, BMW says.
BMW has not only unveiled the updated 2019 BMW i8 Coupe today at the LA Auto Show, but has also unveiled the new i8 Roadster.
It's been a great addition to the BMW range, now the i8 will welcome a second variant - a roadster. Pressing the eDrive button increases all-electric top speed to 120 km/h (75 mph).More news: Sam Allardyce poised to take over at Everton after talks progress
BMW says it has improved its technology surrounding the drivetrain of the i8, which now has more power from its electric motor and a longer range.
Going into more detail, the aluminium parts of the hood have been made using 3D printing, in order to obtain greater precision, while BMW claims to have worked thoroughly on the insulation - both thermal and acoustic.
As before, the electric motor is mated to a 1.5-litre petrol engine which drives the rear wheels making the i8 all-wheel-drive with a six-speed steptronic automatic transmission. The iconic gullwing doors have also been retained.
The 2019 i8 Roadster doesn't look that different from the coupe, other than the different top and the fact that the two rear seats have been removed.More news: Dancing ballerinas help kick off Christmas at White House
However, with the system working at full capacity, the performance is much more attractive - it accelerates to 62mph in 4.4 seconds and has a maximum (restricted) speed of 155mph.
Another change to the powertrain is the new lithium-ion battery that now boasts a cell capacity of 34Ah (up from 20Ah) and an energy capacity of 11.6kW (up from 7.1kW).
As far as fuel consumption is concerned, the i8 Roadster boasts a combined consumption figure of 135mpg, while the i8 Coupe manages 149mpg. Mpg has also been improved to 149.8mpg for the Coupe and 134.5mpg for the Roadster, although these numbers are always notoriously hard to replicate in the real world, unless you charge frequently and mainly undertake short journeys.More news: Supreme Court to hear plea against Padmavati today