The next example of Mazda's second generation Zoom-Zoom product will star on the Mazda stand at the Australian International Motor Show in Sydney from 11–21 October 2007.
The country's top-selling import brand will reveal the third in its series of "extreme" cars, while the stand will also feature the all-new seven-seat CX-9 SUV, which goes on sale in December.
A new 2.5-litre petrol engine has been developed from the previous 2.3-litre unit. The MZR 2.5, which mates to either a six-speed manual or five-speed Activematic transmission, has a bigger bore and a longer stroke, plus freer-flowing intake and exhaust ports which together improve torque in the frequently used-range by approximately 10 per cent. This assures a more linear acceleration feel, nimbler driving and more precise response.
The six-speed manual transmission offers an especially precise shift operation with built-in positive stops for the extremes of the gear lever’s movements. Also, with the counter weight, a light and smooth operation feel was pursued. The synchronisers between 5th and 6th gears have been enlarged to lower the shift force required during high-speed driving by 15 per cent compared with the previous version.
The all-new Mazda6 is fitted with larger front brake discs and a larger-diameter master cylinder to enhance the performance level, and brake feel is optimised by various brake tuning measures. The result is a brake system with a very rigid and linear feel, and a controllable brake performance that conforms to the driver’s intentions.
As well as achieving high body rigidity, Mazda engineers worked on reducing weight to further improve dynamic performance and fuel economy. Reinforcement at key points and the widespread use of high-tensile and ultra-high-tensile steel brought significant increases in torsional stiffness, up by 30 per cent for the hatchback, 25 per cent for the estate and 14 per cent for the sedan.
Despite this, the body shell's weight is greatly reduced to class-leading levels due to the increased percentage by weight of high-tensile and ultra-high-tensile steel sheet and optimal layout created by using CAE technology.
Attractive styling and aerodynamic efficiency go hand-in-hand with the all-new Mazda6. From the early stages of development, Mazda engineers utilised simulation testing to the fullest in order to improve their initial designs, and then carefully fine-tuned them with prototypes and the wind tunnel. In the end, they achieved a remarkable drag coefficient (Cd) of 0.27 for the hatchback and sedan versions and 0.28 for the estate.
New horseshoe-shaped air deflectors ahead of the front wheels ensure adequate brake cooling despite the low Cd. Fore-and-aft lift balance is also optimised, keeping the car stable and firmly grounded at high speed.