Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Volkswagen XL1

This, remarkably, is the production version of the Volkswagen XL1, the most fuel-efficient production car in the world, a car we'll see in Geneva in a little over a week. Barely changed from the concept version shown at the Qatar motor show two years ago, the production XL1 is the first production result of VW's 1-liter project – to design a car that uses less than 1l/100km (282.5mpg imperial) – that started with the lozenge-shaped, tandem-seat 2003 1L and the later L1 of 2009. The XL1 actually beats that by sipping just 0.9 liters with CO2 emissions of 21g/km.

Lamborghini Aventador J Roadster revealed officially

Lamborghini Aventador J Roadster After the leak of the Lamborghini Aventador J over the weekend, tonight we get the official reveal of Lamborghini’s stripped-out Aventador Roadster When we ran leaked photos of the Lamborghini Aventador J Roadster at the weekend we said it threatened to steal a bit of Ferrari’s limelight at the Geneva Motor Show – and it will. The Aventador J  Roadster is Aventador to the max, with all fripperies – including the windscreen and roof sacrificed in the pursuit of low weight and extreme performance. Lamborghini say the Aventador J is a four-wheeled sport-bike, and they’re not wrong.

Subaru XV Black Limited Edition: Costs from £24,495

The Subaru XV Black Limited Edition Subaru launched their XV SUV – basically a high-riding Crossover Impreza – back in 2012, and it was a decent offering. But by this summer they were looking to add a bit more fizz to sales and decided there was room to make substantial cuts in the list price of the XV, taking it down by a significant £2300 right across the range. Now, with prices cut back and the XV starting from £18,995, it seems Subaru has decided it’s time to shift some more expensive metal, so we’ve got the Subaru XV Black Limited Edition which adds more kit and style and starts at £24,495.