RX-8 update stars GT

Mazda Australia has launched an updated three-model RX-8 range, including for the first time a flagship GT variant.

The RX-8 GT starts at $57,625 -- just into the luxury car tax bracket -- and comes standard with 19-inch wheels, Bilstein suspension, Recaro sports seats and body kit (side skirts, 'Aero' front bumper and rear spoiler).

The mid-spec Luxury model, with 18-inch alloys, sunroof, Bose sound system and leather trim, starts at $55,520 and the entry RX-8 (also with 18s) is priced at $47,920. Standard fit equipment for all three models includes sports-tuned suspension, power windows and mirrors, climate control and cruise control.

All models use Mazda's RENESIS 1.308-litre twin-rotor engine, matched to a six-speed manual. The manual unit has been updated and features revised gearing. The final drive [differential] ratio has also been shortened (from 4.444:1 to 4.777:1) for better acceleration and responsiveness.

While the GT and entry level RX-8 are manual only, the Luxury model can be ordered with a new six-speed 'Activematic' auto transmission.

The new Activematic unit is produced by Aisin and replaces the outgoing model's four-speed automatic offering. It comes at a $1650 premium over the Luxury's start-up price. The auto features shift paddles and Direct Mode which selects the best gear.

For all the improvements, the new model is actually less fuel efficient, slower and heavier. Consumption is now rated at 12.9L/100km (compared to 12.6L) while the 0-100km sprint now takes 6.4sec rather than 6.2sec. Blame it -- in part -- on the increased weight gain from improvers such as a larger fuel tank and increased body strength, which has added between 20 and 30kg, depending on model.

On the plus side, Mazda says that the new RX-8 is now more drivable in "mundane" scenarios with a better spread of low to mid-range torque.

According to the maker it's also faster than the outgoing model; lapping the Calder Park racing circuit 1.9 seconds quicker in back-to-back testing.

Engine power output is the same as the outgoing model if fitted with the six-speed manual (170kW at 8200rpm) or 158kW at 7500rpm with the Activematic auto, which is an improvement of 17kW. The Mazda-produced manual unit is the same used by the MX-5 model.

Torque output is the same for both versions, at 211Nm (at 5500rpm). Previously the four-speed auto offering was good for 220Nm at 5000rpm.

Though the manual variants are redlined at 9000rpm (cut-out is 9500rpm), the auto version is reined in at 7500rpm. This is to prolong the life of the slushbox's torque converter.

The updated RX-8 range features a revised front spoiler with enlarged front air intakes that have helped to increase cooling airflow, according to Mazda.

Mazda also says modifications to the rotary engine have enabled more usable torque characteristics while the new model's stiffer chassis has improved handling. The latest RX-8 also benefits from suspension revisions including softer springs for better ride.

Mazda Australia says it has sold around 5400 RX-8s since the model's release Down Under in 2003. The company claims the coupe's closest rival, Nissan's 350Z, has moved 3717 in the same period.

The company expects the GT model will be the range's best-seller, accounting for around 40 per cent of sales. It says the majority of Luxury models (30 per cent of the total) will be ordered as manuals.

Visit the Carsales Network again for our drive impressions of the new RX-8.

2008 Mazda RX-8 pricing
RX-8 -- $49,720
RX-8 Luxury -- $55,520
RX-8 GT -- $57,625
Six-speed Activematic transmission (Luxury model only) $1645

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