It may be beguiling, but the M5 is one seriously expensive 5 Series. It costs around £10,000 more to buy outright than the base Mercedes-AMG E63, although the full-fat E63 S is more comparable in terms of both price and performance. In fact, BMW has also placed its super-saloon right in the firing line of the supremely capable Porsche Panamera Turbo, a car that is more luxurious and, on the right road, more entertaining to drive.
And despite BMW’s best efforts to reduce weight by using copious amounts of carbonfibre, the M5 is still only capable of producing an average fuel economy figure of just 26.9mpg, and you can expect to half that number if you use the full might of the engine. You’ll need deep pockets to run an M5 as a company car, too, due to its high CO2 emissions of 241g/km.
Use our True MPG calculator and see what your car really does to the gallon
Still, you do get plenty of kit for your money. As standard, it comes with 20in alloys, bespoke M bumpers and side skirts, a limited-slip differential and electronically adjustable heated front seats. And the list also includes adaptive LED headlights, front and rear parking sensors, adaptive cruise control and automatic lights and wipers.
As we mentioned earlier, the M5 is so well equipped that you don’t really have to buy any options. However, if you fancy taking your M5 on track (or onto an autobahn, for that matter) you might want to spec the optional carbon ceramic brakes, the M Sport exhaust system and the M Driver’s package, which increases the top speed from 155mph to a frankly bonkers 190mph.
Although the M5 specifically hasn’t been crash tested by Euro NCAP, it awards the regular 5 Series its top five-star crash-test rating, with a particularly high score for adult occupant protection. Meanwhile, the standard active safety systems fitted include automatic emergency braking.
For all the latest reviews, advice and new car deals, sign up to the What Car? newsletter here
Page 5 of 5