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

Jaguar XKR Speed Pack (2010) first pictures

Jaguar will launch two new styling and performance packs for the 2011 model year XKR coupe at the Geneva motor show. The new XKR Speed Pack and Black Pack lets customers spec up styling accoutrements and raise the top speed from a limited 155mph to 174mph. This Jag XKR does what it says on the tin, unleashing the potential of the 503bhp/461lb ft supercharged V8 for a £3500 supplement.

Mercedes Ener-G-Force: It’s a future Mercedes G-Class

Mercedes-Benz has revealed the Mercedes Ener-G-Force Concept – a tease for a future Mercedes G-Class to rival the Range Rover. For starters, the Ener-G-Force Concept is arriving at the Los Angeles Auto Show later this month all dressed up as a Highway Patrol Vehicle as Mercedes’ entry in to the Los Angeles Auto Show Design Challenge. But it’s also pointing firmly towards Mercedes plans to give Land Rover – and in particular Range Rover – a run for their money.

Citroen C4 (2011): first official pictures

This is the new Citroen C4, the French car company's latest rival for the ever-present VW Golf, Vauxhall Astra and forthcoming Mk3 Ford Focus. Citroen hopes to challenge the trio with a mix of class-leading interior space and a gadget-laden cabin, and the new C4 will be unveiled at the Paris motor show this September, before UK sales start in early 2011. Yup, and there’s some Megane Coupe in there too.