The 993 Turbo, introduced in mid-1995, retained a tight hold on the torch of the most powerful 911 variant whilst continuing the general developments and improvements to the breed as a whole.

Amongst the new features was an electronically controlled viscous coupling all-wheel drive system, something Porsche had not offered on a turbocharged model since the 959 and a system that greatly improved the car's usability.

Under the engine lid, now topped with a sculpted spoiler tail with downturned edges, resided the 3.6-litre flat-six fed by twin K16 turbos.

Combined with bigger brakes, fatter tires, a wide body and a lower stance, the 993 Turbo had evolved into one of the fastest cars on the planet.

With all four wheels helping to evenly distribute over 400bhp, 0-60mph was dispatched in a staggering 3.7 seconds, 100mph whistled by in 5.7 seconds and the linear forward thrust continued until the speedometer needle had said goodbye to 180mph and you were on conversational terms with the h...