Downsizing seems to be the norm these days, but BMW / Mini clearly hadn't received the memo. The Convertible finally gets the double-cream, full-fat 2-litre turbocharged 4-pot mill from the Cooper ’S’. The out-going Mini Cooper Convertible’s Peugeot-derived, naturally-aspirated (read = wheezy) 1.6 litre motor never did it any justice. BMW claims that this new 2-litre TwinPower Turbocharged engine nestled under that clamshell-bonnet is not only more powerful - 189 BHP (67 BHP more than the N/A Peugeot engine), but also more reliable.
Squeeze the throttle after having engaged ‘Sport’ mode and the car hooks up and fires down the road with minimal hesitation. Back off the throttle and the exhaust treats you to a little snort on the overrun. The stock exhaust note is pleasing, but even with the top down, it's fairly muted. This is where I would highly recommend that you spec your Convertible with the JCW Kit - complete with JCW steering wheel + paddles, a mild power-bump and a popcorn machine at the back that also happens to expel exhaust gasses.
The punch from the engine is seriously addictive though. It’s a proper point-and-shoot car! You’ll find yourself doing silly and dangerous speeds in no time. The 6-speed Steptronic automatic gearbox is quite snappy and nearly as quick-shifting as the double-clutch units out there. Leave it in ‘D’ and the car will amble along, churning out 280 NM of torque at a scarcely believable 1,250 RPM and making ridiculously light work of traffic. You could leave the gearbox in ’S’ to keep the engine on the boil or use the convenient yet shockingly optional(!) paddles to summon those 189 horses. Unfortunately, a manual transmission isn’t even an option and there’s no doubt that rowing the gears yourself would have been an absolute hoot in this little car. That being said, the claimed acceleration figure in the automatic is actually marginally faster! 7.1 seconds is what it takes the Cooper S Convertible to tickle the century mark from a standstill.
The claimed fuel efficiency of 14.59 km/l seems far-fetched, given the sort of performance it's capable of. But with all of its torque peaking at a low 1,250 revs and the 'Green' mode's 'coast' feature that decouples the drivetrain at cruising speeds working in conjunction with the engine start-stop feature, you might manage double digits with a light foot.
If you've driven one of the larger-displacement TSI engines from the VAG stable, the Cooper S’ straight-line performance would seem familiar. But turn the steering wheel and that’s where the similarities ends.
For what is essentially an EPS unit, BMW has done a remarkable job with the steering's calibration! It’s sharp, accurate and a little chatty, albeit artificial. Even minimal steering inputs will induce immediate reactions and results! The light front end makes it darty, agile and extremely eager to turn in. It's an absolute joy to pelt around sweeping curves and tight bends. That said, it seems to have lost just a little bit of that sharpness that you’d find in the old R56 Cooper's steering. It may be more mature and grown up, but it’s still a very lively, direct and fun car that loves to be flung around all day long.
Sport mode a.k.a. ‘Maximum Go-Kart Feel’ changes the character of the car, although not by a great deal. It sharpens up the throttle, stiffens up the dampers, dials in a bit of weight into the steering and keeps the engine in its power-band by holding onto a lower gear. You could also fiddle with the settings and have it set the way you like. For instance, you could have your sharper throttle and loud exhaust, but still have the dampers set up for normal driving.
On smooth roads, the car remains composed and sorted even when pushed hard. On less-than-perfect streets though, the chinks in its armour will begin to surface. The ride quality on the Sporty damper setting is harsh, even on remotely uneven / rough surfaces. There’s very little compliance from the dampers at higher speeds. In the default damper setting, it’s bearable, but only just. There is an improvement in ride quality over the outgoing car, but it’s still a stiffly sprung set-up. Long drives will be potentially exhausting thanks to the busy ride. And typical of Minis, it will sniff out cambers and hopelessly tramline as well! Hit a bump mid-corner and the car will feel unsettled, twitchy and nervous. Introduce water to the surface and you’re going to have your hands full. It can be playful and engaging as long as you know what you’re doing. Grip levels from the Hankook Ventus rubbers are satisfactory, but the runflats ruin the ride quality further. An after-market swap may not be such a bad thing.
The Cooper S Convertible had to receive additional structural bracing underneath the radiator, doors and cabin in order to improve rigidity and compensate for the loss of support from the pillars / roof.
Stopping this little car is nearly as enjoyable as hustling it. The brake pedal is sharp, progressive, bites hard without feeling grabby and offers good feedback. Ventilated discs up front and solid discs at the back do a great job of shedding speed and bringing the little car to a stop sans drama. A host of electronic aids like ABS, EBD, CBC, DSC, DTC etc. ensure that you don’t find your way into a ditch too easily.