Tesla has is to launch an entry-level 70kWh version of its Model S saloon for £50,800, including the Government’s £5000 Plug-in Car Grant.

The single-motor 70 model is available to order, with deliveries beginning in late November. It has a range of 260 miles.

The previous cheapest Model S – a dual motor version fitted with the 70kWh powertrain – is still on sale, priced from £54,500 after the £5000 grant.

The American company also announced that owners of vehicles powered by the 85kWh unit can upgrade to a 90kWh motor for £2500. Tesla said the range of the car is as a result increased by around 6%.

Tesla also announced a performance upgrade for the P85D model, dropping the vehicle’s 0-62 time down from 3.1 to 2.8 seconds.

Known the Ludicrous mode, the upgrades allow the car to run at 1500 Amps instead of 1300. The upgrade costs £8300 and is independent of the 90k Wh battery pack upgrade.