Have no fear, sports fans, as the Range Extender is unlikely to find its way into a Lotus-badged product any time soon - Lotus Engineering's primary focus is to develop technology for other manufacturers to use.
It's been designed as an off-the-shelf engine for any production series hybrid, and could be sold to any number of car companies. Okay, so that's not particularly exciting in itself, but it's surely a rather nice potential money spinner for Lotus - and that means more development cash for proper sports cars.
The Lotus Range Extender could even find its way into a Jaguar, as it's been developed with Jaguar as part of the UK Technology Strategy Board's 'Limo-Green' scheme, a project funded by Lotus Engineering, MIRA, Caparo and Jaguar. If the new engine does end up in a series production Jag, it could be part of the company's project to make an executive saloon with a CO2 output of less than 120g/km.
What's really clever about the new engine, says Lotus, is its design: the cylinder head, block and exhaust manifold are all integrated into one casting, creating what the boffins at Hethel call a 'monoblock'. This eliminates the need for a cylinder head gasket and around 17 other separate parts. The weight of the unit is also reduced, while durability and fuel consumption are both improved.
1.2 litre 3-cylinder with 2 valves per cylinder, SOHC
Monoblock with Integrated Exhaust Manifold
Balance shaft (optional)
Bore and Stroke: 75.0 mm x 90.0 mm
Compression ratio: 10:1
Maximum power: 35 kW (47 bhp) at 3500 rpm via integrated electrical generator
Peak torque: 107 Nm at 2500 rpm
Maximum BMEP: 11.2 bar
Maximum Engine Speed: 3500 rpm
Fuel System: Port fuel injection, Lotus EMS
Fuel: 95 RON ULG / ethanol / methanol
Dry weight:56 kg