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Mercedes has released additional information about the 2013 G63 and G65 AMG.

First up, the G63 AMG features a twin-turbo 5.5-liter V8 engine with 544 PS (400 kW / 536 hp) and 760 Nm (560 lb-ft) of torque - an increase of 37 PS (27 kW / 36 hp) and 60 Nm (44 lb-ft) compared to the G55 AMG. It is connected to a seven-speed AMG Speedshift Plus 7G-TRONIC transmission which enables the model to accelerate from 0-100 km/h in 5.4 seconds and hit an electronically limited top speed of 210 km/h (130 mph).

Despite being powerful than its predecessor, the G63 is more fuel efficient thanks to an engine start/stop system. It helps the Geländewagen to average 13.8 L/100km (17.0 mpg US / 20.5 mpg UK) with CO2 emissions of 322 g/km.

Besides adopting a new engine, the model benefits from an aggressive front bumper, a revised grille, a retuned suspension and a new exhaust system. There's also 20-inch alloy wheels that are backed up by high-performance brakes that measure 375 x 36mm front / 330 x 20mm rear.

Inside, the cabin is significantly improved with higher quality materials and upgraded electronics. Notable highlights include designo leather upholstery, an AMG instrument cluster and illuminated door sill plates.

Moving up to the G65 AMG rewards buyers with one of the most impressive SUVs ever created. It features a 6.0-liter biturbo V12 engine that develops 612 PS (450 kW / 603 hp) and 1000 Nm (737 lb-ft) of torque. This enables the SUV to run from 0-100 km/h in 5.3 seconds and hit a limited top speed of 230 km/h (143 mph). In terms of efficiency, owners can expect to average 17.0 L/100km (13.8 mpg US / 16.6 mpg UK) with CO2 emissions of 397 g/km.

The G65 AMG is also distinguished by a high-gloss chrome grille, "V12 BITURBO" badging and titanium grey 20-inch alloy wheels. Inside, there's diamond-pattern designo leather seats, piano black trim and exclusive floor mats.

Both models will be launched in June and Germany pricing starts at €137,504.50 for the G63 and €264,180 for the G65 (including 19% VAT).

Gallery: 2013 Mercedes G63 & G65 AMG: In Depth

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