At higher speeds the clutch closes to yoke the 1.4 engine and the electric motor together, their combined outputs limited to 161bhp. The 40bhp generator provides an extra accelerative boost at low speeds, besides being driven by the petrol engine to recharge the battery.
But while this propulsion strategy sounds – and is – complex, driving the TwinDrive Leon is easy. There’s the momentarily disconcerting EV experience of twisting the ignition key to hear silence, the Leon advancing on amperes, but the automatic transmission lever is entirely conventional, selection of ‘D’ allowing an immediate departure. Pull it back a notch further and you get Sport, or you can sink a green button for electric drive only, perhaps for zero emission city travel.
For many commuters the Leon will rarely use its petrol engine what with that 32-mile range, the battery best charged overnight from the mains.
Driven gently, the Seat is much like any other electric car, advancing in eerily brisk and restful silence. Accelerate hard and you can hear the petrol motor kicking in, though in the same slightly disconcerting style as an engine harnessed to a CVT transmission, the revolutions of its crankshaft bearing little relation to those of the driven wheels. But a prototype is what this car is and Seat is about to trial five examples with Spanish fleets to get an idea of how the car will be used, and what drivers think of it.
Should I buy one?
Of course, the Leon TwinDrive initiative is part of a much wider programme across the VW Group, and while the Spanish brand is making concrete contributions with this modest fleet programme and various activities with suppliers, the main driver of the project is VW. Seat’s strategic role is to make this technology more affordable to buyers. And that’s quite some challenge, Seat’s R and D chief Dr Matthias Rabe revealing that a TwinDrive Leon costs around five times as much to make as the conventional version. Closing that cost gap is one reason why we won’t be buying a TwinPower Seat, or VW, much before 2015.
Seat Leon TwinDrive Ecomotive
Price: TBA; Top speed: 106mph; 0-62mph: 11.0sec; Economy: 166.2mpg combined; Co2: 39g/km; Kerbweight: 1680kg; Engine: four-cylinder in-line, 1390cc; Installation: transverse, fwd; Power: 159bhp combined; Torque: 442lb ft e-motor, 184lb ft generator; Gearbox: single speed; Range: 32 miles electric, 550 miles combined