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

Spied: Porsche 911 GT3 RS

The mild redesign of Porsche's 911 range will get to the ultra-high-performance GT3 RS model, based on these spy shots. This prototype was nabbed making a cross-country U.S. dash.

Toyota Hybrid-R Concept – a Yaris with 400bhp – teased for Frankfurt

The Toyota Hybrid-R Concept (pictured) is a 400bhp Yaris Hybrid heading for Frankfurt We’ve always believed that the best use for hybrid powertrains is to get extra performance without the penalty of increased fuel consumption. Toyota, on the other hand, have primarily used their impressive – if complicated and expensive – hybrid powertrains to yield improved economy and emissions from more prosaic cars like the Prius, Yaris and Auris. But now it looks like Toyota are ready to show us what hybrid technology can offer in the way of performance too, with a tease for what Toyota are calling the Hybrid-R Concept, which appears to be a Yaris with more than 400bhp on tap.

Honda CR-Z Mugen RR – it’s the Japanese version

Honda CR-Z Mugen RR - no power details forthcoming We’ve reported quite a bit on Mugen UK’s efforts to sprinkle fairy dust on the Honda CR-Z Hybrid to turn it in to the sort of hybrid that would appeal to a keen driver. And now it’s the turn of Mugen in Japan who have also built a supposedly one-off CR-Z – the Honda CR-Z Mugen RR. The Euro Mugen CR-Z – which was on show at Goodwood last month – was eventually fettled to deliver 197bhp by bolting on a supercharger.