Infiniti has confirmed its BMW 5 Series-rivalling M saloon will be priced from £35,150 when it arrives in the UK in September.

The range of executive saloons will begin with the M37 powered by a petrol 3.7-litre V6 engine, but it will be followed a month later by the M30d 3.0-litre V6 diesel, and in 2011 by a low-CO2 M35 Hybrid.

The M37 is powered by a 320bhp engine with a 0-62mph sprint time of 6.2 seconds and top speed limited to 155mph.

All versions come with a seven-speed automatic transmission, bi-xenon headlights, 10-way power front seats, reversing camera, hard disk drive (HDD) sound system and Infiniti’s new Drive Mode Selector which tailors key driving parameters to Sport, Normal, Snow and Eco settings.

The M37 GT (from £37,650) adds semi-aniline leather, heated and ventilated front seats and white ash wood trim with silver powder finish. The M37S (from £39,650) is the driver-focused choice, with four-wheel active steering (4WAS), sports suspension, sports seats (also heated and ventilated), gearshift paddles and 20-inch alloy wheels.

Premium versions of both the GT (from £43,000) and the S (from £45,000) come with every feature available, including the Dynamic Safety Shield package, Forest Air, a 16-speaker Bose sound system and Infiniti’s acclaimed Connectiviti+ information and entertainment platform comprising 30GB HDD navigation.

Premium versions also feature Infiniti’s efficiency-boosting innovation, Eco Pedal. If driving too aggressively, the driver will feel the accelerator pedal “push back” to indicate fuel is being wasted.

The M37 accelerates from 0-62mph in 6.2 seconds and top speed is electronically limited to 155 mph. Fuel consumption on the combined cycle is 27.7 mpg while CO2 emissions are 235 g/km.

Click here to read our driving impressions of the Infiniti M30d prototype.