VIDEO: Porsche 911 R battles a ’67 911 R

Porsche has released a new film that unites the new stripped-out 911 R that was revealed at the recent Geneva motor show with the 1967 911 R homologation special that inspired it.

The short video, that takes place on an alpine pass in the Swiss Alps sees both new and old Porsches climb the tight and twisting pass accompanied by the soundtrack of two flat-six engines working hard.

Just to remind you, the new 911 R is a product of Porsche Motorsport. That’s why it inherits much of its weight-saving chassis and body parts from the GT3 RS.

Weighing in at 1370kg, it’s the lightest current 911.

Under the rear bonnet there’s the GT3’s naturally-aspirated 4.0-litre flat six that delivers 368kW/460Nm and spins to 8250rpm.

Porsche claims the lightest current 911 will reach 100km/h in 3.8 seconds and it insists it will hit its redline in sixth gear to give it a 323km/h top end.

Just 23 original 911 Rs were made in 1967. Created as a purebred race version of the 911, the R (for Racing) model was powered by a 157kW 2.0-litre fat-six that could spin to 8000rpm. It was rumoured to be almost identical to the engine that powered the 906 Carrera 6 race car.

Using experimental fibreglass reinforced polymers to make the front boot lid, doors and bumpers, plus a thinner front screen and plexiglass side windows, the lightest 911 ever built weighed in at an incredible 800kg.

Combined with the race-bred 2.0-litre, the original hit 100km/h in 5.9 seconds.

The new 911 R is expected to cost more than $400,000 when it goes on sale.

For that you get no air-conditioning, no infotainment system and plexiglass side windows -- just like the original.

Just 991 911 Rs will be made with about 25 cars coming to Australia. All are believed to have already been sold out.