The latest arrivals at dealerships. Compiled by Paul Hudson BMW 6-Series Price: £49,300-£57,745 (coupé), £54,945-£63,215 (convertible) Engines: 3.0, 4.8 petrol; 3.0 diesel Dealer contact: 0800 325600/www.bmw.co.uk One of the highlights of a coupé and convertible range, refreshed for 2008, is the new 635d, featuring the world's most powerful production six-cylinder diesel. This sequential twin-turbocharged engine develops 268bhp and 428lb ft of torque from only 1,750rpm, providing 0-62mph in 6.3 sec (convertible 6.6). Both are limited to 155mph and manage about 40mpg (EU Combined). The straight-six 3.0 petrol and 4.8 V8 petrol engines have been improved, with 272 and 367bhp respectively. A restyle includes a larger grille and new headlights. We like: Amazing ride and handling, interior, huge boot, appearance. We don't like: The iDrive control, over-thick steering wheel. Mazda RX-8Renault LagunaSeat Altea Freetrack 4Hummer H3 | 
