New BMW M4 vs Mercedes-AMG C63: costs
The M4 is a new range-topping version of our reigning Coupé of the Year, but is it better than its arch-rival from Mercedes' AMG performance division...
Buying and owning
Costs, equipment, reliability, safety and security
The C63 S saloon actually undercuts the M4’s list price by nearly £2000, but opt for the coupé variant that we have here, and you’ll have to pay a hefty premium because it’s currently available only in range-topping Night Edition trim. Mercifully, both cars are available with big discounts (either by haggling or via our online New Car Buying service), but even after these are applied, the C63 S Coupé still costs nearly £4000 more than the M4.
That goes some way towards the M4 being the cheaper car to own privately over three years – by nearly £6000. Better fuel economy (we saw 26.6mpg from the M4 on our mixed test route versus 23.3 from the C63), cheaper insurance, lower servicing costs and slower depreciation help, too.
The M4 is also quite a bit cheaper if you’re buying on PCP finance. Stick down a £12k deposit on a four-year deal, limited to 10,000 miles a year, and you’ll pay £761 per month, compared with £899 for the C63.
Pleasingly, both cars get a lot of standard kit, including LED headlights, two-zone climate control and premium sound systems, although it might come as a surprise that keyless entry and a powered boot lid are reserved for the options list on the M4. The same goes for safety kit; both get automatic emergency braking and a cross-traffic alert system (which applies the brakes if it detects traffic crossing behind you as you’re reversing), but the C63 adds lane-keeping assistance and adaptive cruise control; these systems are part of the reasonably priced Technology Plus Pack on the M4.
The safety experts at Euro NCAP haven't tested these specific models, but their everyday counterparts (the 3 Series and C-Class saloons) both received five-stars; it’s worth noting that the Merc’s result was under older, less stringent rules.
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