BMW's latest M5 may well be the most powerful and fastest four-door in the company's history, but it's still got a long way to go to top of the list of the fastest out there across all automakers. Here are the top ten four-doored speed masters:
(See also: The BMW 5-Series Catches The Seventh Wave)
Aston Martin Rapid AMR: 210mph
Proving that there's no replacement for displacement, this track-inspired and carbon-fiber-clad take on the British company's luxury sedan uses a 600hp, 6-litre, naturally aspirated V12. And, as it will be capped at just 210 examples, it's very unlikely you're ever going to see one on the road.
Alpina B5 BiTurbo 4WD: 205mph
Like the new M5, this hand-built car starts life as a regular BMW 5 Series but it gets an Alpina twin turbo powerplant and gearbox plus four-wheel drive for supercar performance -- with German sedan reliability.
Dodge Charger Hellcat: 204mph
Such was the excitement when Dodge announced it had stuck a supercharger on to its already potent Hemi V8 and then somehow managed to squeeze it under the hood of the Charger that the company had to suspend taking orders for the car as it was absolutely overwhelmed by demand.
Bentley Flying Spur W12S: 202mph
Cadillac CTS-V Sedan: 200mph
Thanks to a supercharged V8 and months spent gathering data on the Nurburgring, this is the American luxury sedan that can compete with anything that the big three German companies offer, even in terms of aesthetics.
Jaguar XE SV Project 8: 200mph
Like the Aston, this car will be strictly limited. Just 300 examples are set to be built and each lucky owner will get a compact sedan capable of hitting 100km/h in under 3.5 seconds. Thanks to all-wheel drive it won't waste any of the 600hp developed by its 5-liter supercharged V8.
Porsche Panamera Turbo S E-Hybrid: 193pmh
The most environmentally conscious Porsche sedan is also its fastest. Thanks to a hybrid system derived from the unit used in the hyper-fast, hyper-exclusive 918 Spyder, this car provides instantaneous acceleration, but can also roll around town without making a sound or pumping out a single gram of CO2.
Alfa Romeo Giulia Quadrifoglio: 191mph
It's been decades since Alfa built a car worthy of its motorsports legacy, but with the Giulia it is making up for lost time incredibly quickly. It has the smallest engine of any car in this list -- a 2.9-liter V6, but thanks to twin turbochargers actually fitted within the 'V' of the cylinder banks, the compact, lightweight unit pumps out a remarkable 510hp.
Maserati Quattroporte GranSport GTS: 191mph
Consider the Maserati the Alfa's big brother, as they're both currently made by Fiat Chrysler. It uses a twin-turbo 3.8-liter V8 to arrive at its top speed, and despite being the same size as a BMW 7 Series, thanks to a wonderful chassis and suspension setup, it feels more like a Ferrari in the bends.
BMW M5: 190mph
The newest car in the list is also the slowest, in a straight line at least. But BMW has never built a bad M car, and the latest M5 promises an intoxicating mix of power with responsibility and reliability, plus a host of next-generation driving aids and semi-autonomous features that no other company in this list, save VW-owned Bentley, can come close to matching.