2014 BMW M4 Convertible | new car sales price

Drop-top BMW M4 arrives in Australian showrooms with boosted performance and value over M3 predecessor.

The folding hardtop version of BMW's new M4 performance model is now on sale in Australia.

The M4 Convertible replaces the old E93 M3 Convertible and is priced from $178,430, representing a $2320 saving over the equivalent previous model. The dual-clutch auto was a pricey $7300 option on the old V8-powered M3 Convertible, but is now a no-cost option across the entire M3 and M4 range – including the new drop-top.

Also like the existing M3 and M4 models, the M4 Convertible is powered by a 3.0-litre twin-turbo straight six engine that pumps out 317kW and 550Nm. Despite carrying around an extra 250kg over the coupe, the open-top M4 can still crack 100km/h in a spritely 4.4 seconds – three tenths slower than the coupe.

The BMW's only direct rival is the Audi RS5 Convertible, which has 331kW but 120Nm less torque from its naturally aspirated V8 and is half a second slower to 100km/h. The Audi is slightly cheaper at $176,400, but is thirstier and has an expensive list of options, including $4700 for adaptive suspension (standard on the M4) and $4900 for sports bucket seats.

The M4 Convertible is lower, wider and altogether more aggressive looking than a standard 4 Series drop-top. It features deeper and more aggressive air intakes, pumped up wheel arches, aerodynamically optimized door mirrors, four exhaust tips around the back and wider wheels and tyres.

Beneath the sheetmetal there's all new suspension hardware with standard adaptive dampers and larger brakes with carbon ceramic discs available as an option. An electronically controlled Active M Differential also features and can vary the amount of power sent to each wheel or lock the rear wheels together completely for controlled drifts.

Inside the M4 convertible gains sports seats which are unique to the drop-top and feature illuminated 'M' badges and 'Air Collar' functionality. Sports steering wheel, leather-covered dashboard and carbon fiber trim pieces also feature.

BMW claim the new model offers more than $10,800 worth of extra value over the old M3 Convertible with standard features including, seats with integrated air-con vents, rear-view camera, surround-view camera, M-DCT dual clutch auto transmission, iDrive touch controller and DAB digital radio.

The M4's electrically operated metal folding hardtop takes 20 seconds to open or close, which can be activated at speeds of up to 18km/h. With the roof closed the boot offers 370-litres of luggage space, which shrinks to 220-litres with the hardtop folded away.