The AC Schnitzer GP3.10 accelerates from 0-62mph (100kph) in 4.6 seconds.

A modified BMW 3-Series has broken the world record for an LPG-powered car reaching a top speed of 197mph.

German tuners AC Schnitzer fitted the BMW 3-Series coupe with the engine from the M5 and upped power from 500bhp to 552bhp.

This rocketed the AC Schnitzer GP3.10 – to give it its correct name – from 0-62mph (100kph) in 4.6 seconds, 0-124mph in 13.9 seconds before topping out at 197mph.

The record-breaking run took place at Nardo in Italy, an eight mile high-speed bowl where the Brabus Rocket set a world best for a saloon car last year, hitting 225mph.

Rolling on 20-inch alloys, the coupe has been fitted with an aggressive bodykit and funky roof spoiler. Inside, the 3-Series gets a complete makeover and is fitted with a full Nappa leather trim.

Liquefied petroleum gas (LPG) is a cheaper alternative to conventional fuels and emits 15 per cent less carbon dioxide that its petrol and diesel rivals.

However, it’s unlikely you’ll see any of these £140,000 motors on the road - the AC Schnitzer GP3.10 is just a concept.

View more pictures of the 197mph AC Schnitzer GP3.10