The car was based on the Lamborghini Diablo utilising most of its mechanical components and its V12 engine as Megatech owned Lamborghini at that time and took such steps to produce the car in higher volumes at a low cost. The engine was centrally mounted in front of the gearbox rather than behind it as in the Lamborghini. The styling was a loose copy of the Vector AWX-3, which was a still born project due to the Megatech takeover and later infringed by former company owner Wiegert after he initiated lawsuits and patented the designs to avoid them being reused. The new owners, Megatech, hired designer Peter Stevens to create a more civilised and modern recreation of the AWX-3. The drivetrain was a Lamborghini V12 engine, which had a power output of at 5,200 rpm and of torque at 4,900 rpm. This differed from the twin-turbocharged Rodeck V8 engine in the W8 and the AWX-3, as they were considered to be too costly for series production of the new model. The W8 and AWX-3's engines were transversely mounted, unlike the M12's V12 which was longitudinally mounted. The engineering changes placed the cockpit slightly forward than in the AWX-3, with a shorter nose and longer tail. The M12 was able to accelerate from in 4.8 seconds and had a top speed of.
Production
Megatech intended the M12 to be a more road-friendly version of the AWX-3, which could get up to 13 miles per gallon of fuel efficiency. 17 cars were produced in total, which included three or four pre-production models and 14 production models. One of the M12 pre-production cars was converted to motorsport specification by the factory, but did not perform successfully due to mechanical problems. This car would again be converted, this time into the SRV8 that was intended to be the successor to the M12. The M12 production run ended in 1999 when Vector could not pay Lamborghini for the engines. Lamborghini took a W8 as payment, but Wiegert litigated for ownership of that car and won the case.
In the media
The Vector M12 earned the inauspicious award from Autoweek Magazine as being the worst car ever tested in the history of AutoWeek. The M12 is featured in a number of video games, including:
Gran Turismo 2, as both the production version and as an LM edition;
