And, in a back-handed slap at Porsche, it has offered driving tips for anyone trying to get the best from a GT-R.

Earlier this month we reported on accusations hurled by Porsche towards Nissan, accusing the Japanese carmaker of falsifying the blistering Nurburgring lap time of 7m 29s recorded for the GT-R back in May.

The accusations managed to reach the upper echelons of Nissan management, prompting representatives at last week’s Paris Motor Show to state emphatically that the times recorded for the GT-R around the Nurburgring were achieved "on absolutely standard tires which are available to customers in the showroom," and that any sort of slick tires were never used.

A Porsche chassis engineer took a standard GT-R bought in the United States with regular road tires, and tested it on the same day against a Porsche 911 GT2 and a Porsche 911 Turbo. According to Porsche, the GT-R posted a time of 7m 54s, with the 911 Turbo managing 7m 38s and the 911 GT2 getting down to 7m 34s.

Porsche's contention that the GT-R takes 7m 54s to lap the 'Ring adds a rather significant 25 seconds to the lap time recorded by Nissan's chief test driver Tochio Suzuki. Nissan stated that they were at a loss as to why Porsche was unable to replicate the GT-R's blistering time around the Nurburgring, putting it down to differences between the drivers.

Speaking with Drive, Nissan's European spokesman Neil Reeve stated that Nissan continues to "absolutely maintain (that) Tochio Suzuki pounded thousands of laps and got to know every inch of the Nurburgring and hence set that fabulous lap.”

Reeves went on to comment that it was "flattering that Porsche have bought themselves a GT-R and flown it to Germany" for testing, but that "the people who'd buy a GT-R or 911 Turbo are not the type of people to make a purchase like that lightly.” He also reaffirmed that the GT-R has beat the 911 Turbo during a number of independent tests for both acceleration and circuit lap times.

Nissan has now released an image of the actual tires used for the test plus a second video of the lap as proof that its 7m 29s lap time is legitimate. In an official statement Nissan claims that “there are some important facts that were not accurately represented.”

Nissan has revealed that the GT-R used in the official lap time was actually at a disadvantage due to up to 50kg of testing equipment. According to GTRblog, Nissan has also offered free driver training for Porsche if it wants to attempt a second lap.

Porsche is wasting no time filling up its new Porsche AG Museum in Stuttgart with exhibitions. With interior work on the second floor completing today, twelve exhibitions are already on their way. By the end of this week, the relocation of all 80 exhibits to the new museum will have been completed.

The vehicles have been stored in an off-premises warehouse in Zwingenberg am Neckar until they are transported to the museum. The first exhibits on display include, among others, a 356 Cabriolet, an original ‘11' model and the first prototype of the 924.

"In the last few weeks, we have comprehensively restored all the vehicles and polished them up for their use in the museum," explains Klaus Bischof, head of the ‘Rolling Museum'.

In addition to the exhibition vehicles, the small exhibits and show cabinets have also already been set up. This means that work can be started on the lighting of the exhibition as the next step.

As virtually all museum vehicles are also used on the road and are thus continuously being replaced by other vehicles, the exhibition will constantly change its appearance. As a result, visitors will in future be able to discover different Porsche rarities in the new museum on a regular basis.