Eideard

At the dawn of the millennium, Prof. Dr. Ferdinand Piëch, who is today Chairman of the Supervisory Board of Volkswagen AG, set his sights on creating a practical everyday use production car with a fuel consumption of 1.0 liter per 100 km (235 mpg). In 2002 a prototype VW 1-Litre was unveiled, which was followed in 2009 by the second-generation model, dubbed the L1, which boasted a combined diesel fuel consumption figure of 1.38-liter/100 km (170 mpg). As impressive as that figure is, the company has now managed to squeeze a combined fuel consumption of just 0.9-liter/100 km (261 mpg) with its third-generation VW 1-Litre prototype – the XL1…

With the hybrid system engaged the prototype XL1 accelerates from 0-62 mph (0-100 km/h) in 11.9 seconds and has an electronically limited top speed of 100 mph (160 km/h)…In electric only mode the TDI is decoupled from the drivetrain by disengaging a clutch, and it is shut down. Meanwhile, the clutch on the gearbox side remains closed, so the DSG is fully engaged with the electric motor. Using what is known as “pulse starting”, VW says the restarting of the TDI while driving is very smooth. The electric motor’s rotor is sped up and quickly coupled to the engine clutch, which accelerates the TDI to the required speed and starts it.

Under certain conditions the load shared between the TDI engine and the electric motor can be shifted so that the turbodiesel is operating at its optimum efficiency level. Additionally, the gears of the automatically shifting 7-speed DSG are also always selected with the aim of minimizing energy usage with the engine controller taking into account parameters such as the accelerator pedal position and engine load, as well as the energy supply and mix of kinetic and electrical energy at any given time…

Viewed from above, the car is widest at the front and narrows towards the rear for an improved aerodynamic profile, which VW says resembles the aerodynamic lines of a dolphin. The dolphin-like looks continue to the side profile with the roofline tracing an arc from the A-pillars to the rear.

To prevent air turbulence the rear wheels are fully covered and the air flows have also been optimized by small spoilers in front of and behind the wheels, while the door mirrors have been replaced with digital cameras that send images to two displays inside the vehicle…

When the L1 was unveiled in 2009, Volkswagen indicated it would be entering production in 2013. We’ll be interested to see if this updated model is on track for that date or whether the company hopes to bring the XL1 into production before then.

Latest rumors say late 2012 for consumer purchases. And – yes – it will be expensive. Those goodies in materials and special shapes don’t come cheap. What is significant is there is little that is extraordinarily expensive or off-the-wall engineering. A great deal is off-the-shelf from VW’s production plants. We’re getting to where with proper scale, this can become affordable.

RTFA. Lots of dynamite photos.