Inside, the layout is the same as that of more mundane 6s, which means decent rear legroom and boot space and a fantastic driving position with a seat that cranks down all the way, well-set pedals and a vast range of adjustment in the steering column. Mazda has wisely chosen not to mask the 6’s excellent steering feel with a fat sports wheel; instead you get the standard item in leather. Some of the trim has been upgraded, with better-quality dials and a blue-painted finish on the highlight panels.
But the cosmetic changes pale next to the thoroughness of the re-engineering. It starts with the body-in-white. Instead of increasing stiffness with a couple of strut braces, whole new chassis sections have been bolted in behind the rear seats and the dashboard, and the suspension mountings have been reinforced. Mazda claims a 50 per cent increase in torsional stiffness for the MPS – usually only achieved with a full model change – and says it will build the MPS just as a saloon because the hatch and estate can’t be made stiff enough.
The standard 6’s alert steering has been left alone and the wishbone front, multilink rear suspension remains, but with higher spring rates, thicker anti-roll bars and retuned bushes and dampers. The ride height remains the same and the new wheels get Bridgestone RE050 tyres. Fortunately for ride comfort, they’re of the non-run-flat variety.
The driveline is even more impressive, and almost every aspect of it is new. The aluminium block is shared with the 2.3-litre four used in the standard Mazda 6, but the direct-injection head and turbo are new and allow it to crank out an impressive 254bhp at 5500rpm and 280lb ft at 3000rpm.
Using these two together makes a lot of sense and you can tell that Mazda’s engineers are slightly sore that the Volkswagen Group brought out a 200bhp direct-injection turbo in the A3 and Golf GTi a few months ago. Spraying the fuel directly into the cylinders allows more air to be drawn in, increasing volumetric efficiency. Also, the aerosol effect of the fuel as it atomises cools the chamber and allows a higher compression ratio.
Bakaj’s aim was sharp throttle response and no lag, and he’s so confident of the direct-injection system’s ability to provide them that the unit uses an old-school, relatively small fixed-vane turbocharger. The only downside they’ll acknowledge is that you’ll have to use 97RON super unleaded to get the best from the engine. Running 95 will reduce peak power by about 12bhp.
The compact six-speed gearbox is also new, as is the electronically controlled four-wheel-drive system which sends all the torque to the front wheels in everyday driving, but can divert half to the rears.So does it all work? Your audience will think it does: the turbo muffles any tunefulness but replaces it with a surprisingly loud, hard rip. Inside, you get the usual direct-injection gruffness but there isn’t sufficient noise or vibration to disrupt your attention. The engine’s pull from idle is remarkably linear but don’t expect the pace of similarly priced but more aggressively-blown entry-level Evos. Mazda claims 6.6sec to 62mph and a top speed of around 150mph, which feel just about achievable; think BMW 330i rather than Subaru Impreza STi. The gearchange is great: short, smooth and precise.
Our test was conducted on a track and in development cars, so although they were tuned to final production settings the definitive verdict will have to wait until we drive on the road. But even on the track the 6 was impressive. The steering has the right weight and plenty of feel but little kickback; it’s one of the best aspects of the standard car and is just as good here. Roll is progressive but well-contained, and the ride is firm without being harsh. Push hard and the MPS understeers, but if you keep your toe in you can feel the torque being swiftly but gently sent to the rear wheels and the car’s stance rapidly neutralises. The brakes are good, too. More feel would be welcome but they didn’t fade significantly, even with hard use.