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

The next McLaren supercar will be called the 650S

We've known that McLaren has a pair of additional models in the works, including a Porsche 911-fighting, 12C-based sports car known only as the P13 and another car positioned between the 12C and the P1. Previously, we'd heard the code name “P15” tossed around in reference to that latter car, but McLaren has officially christened it the 650S ahead of its world debut at the upcoming Geneva motor show. According to the automaker, the 650S “takes learnings from both the 12C as well as the sell-out McLaren P1 [ed note: there has to be a better way to say that] and will be positioned between the two on McLaren Automotive's supercar grid.“ We liked the 12C, and we really, really liked the P1.

Porsche 911 GT3 RSR (2011) first official pictures

This is the latest Porsche 911 GT3 RSR, the 2011 version of the famed German sports car company’s range-topping GT racer. The 911 GT3 RSR’s 4.0-litre flat-six engine now produces 449bhp (five whole horses more than the 2010 version) thanks to ECU tweaks, a redesigned exhaust system and a modified air intake housing. Maximum engine revs are a stratospheric 9400rpm, of course it’s rear-wheel drive, and the gearbox is a six-speed sequential unit.

Tax discs will be scrapped in October: do you know the rules?

Paper tax discs will soon be scrapped forever, but a survey of drivers has found that a half are clueless about the new rules. The survey, of more than 1,000 people, suggests that the DVLA has failed to efficiently inform motorists of the changes – despite them coming in from the 1 October 2014. Click on the image above to find out more about the new tax disc rules