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

London's GPS-based speed-limit trial puts Big Brother's foot on the gas pedal

A fleet of 12 Toyota Priuses in London have been fitted with GPS-linked speed limiters to measure how drivers respond to having their speed controlled by a computer rather than their own feet. For now, the trial is local to London, run by Transport for London, the agency that manages the city's roads, buses, subways and trains. The agency is using its own fleet of Priuses for the test and will add a bus and a taxi later this year.

New BMW voice control system

BMW are fitting a new voice control system to their cars from September Hopefully this will work. My own experience of voice control systems is not great – I usually end up doing it manually through the interface. But with BMW’s pretty complicated iDrive system it will be a big plus, and safer, to speak your commands.

Smaller Mercedes SLS confirmed, and with front-mounted V8 too

Baby Mercedes SLS AMG - or at least how it could have looked if mid-engined We’ve believed for some time that Mercedes were planning a smaller version of the SLS, but so far there’s been no official word. But that’s now changed, with AMG’s Christoph Jung telling AutoExpress that Mercedes and AMG are currently working on a smaller SLS, to go head-to-head with cars like the Porsche 911 and Audi R8. Interestingly, we’d thought that Mercedes would go the route of a mid-engined two-seater for the baby SLS, and that it would probably get a turbo V6. But it would appear not.