It may be utterly beguiling, but the M5 is one seriously expensive 5 Series. BMW claims average economy of 28.1mpg, but admits you’ll halve that number if you use the full might of the engine. If it were our money, we’d plump for a 535d M Sport – it’s two thirds of the price, twice as economical and, in the real world, almost as quick.
BMW M5 Saloon quality & reliability
The M5 boasts high-quality materials and exemplary attention to fit and finish throughout its cabin – then again you could say that about any 5 Series. Equally, the quality of engineering is first rate, so there shouldn't be any reliability issues.
BMW M5 Saloon safety & security
The M5 comes with six airbags and a host of electronic driver aids, including stability control and a system that primes the safety kit if a crash looks inevitable. It’s also fitted with devastatingly powerful brakes, which is just as well giving its outrageous performance. Deadlocks, locking wheelnuts and an alarm are on hand to fend off thieves.