Atzporsche:
Boxster Coupe GTS:

The feedback suggests is that Nissan decided to market the GT-R with their definition of an "estimated net power output" - based on 85% of the measured figure - to deliberately obfuscate the real power output of the engine...

This hypothesis certainly appears to be supported by:

  1. feedback from GT-R customers' preliminary dyno tests
  2. comparative performance of the Nissan GT-R in group tests
    (e.g. Chris Harris laps of the GT-R and GT2 around the Nurburgring)
  3. Walter Rohrl's observation of the GT-R's performance vs the 430 Scuderia

The question is whether Nissan has engineered a car that produces a performance significantly out of line with the official power-to-weight ratio, or whether the power output is understated to tilt the performance comps and to appease domestic political considerations...

Smiley

By way of comparison, you may recall that the a couple of years ago the Formula 1 teams agreed to equalise the power output of their engines. Each engine manufacturer provided data on power output and torque across the rev-range and the teams' engineers had a meeting to agree how the engines should be equalised. The teams agreed with the FIA on the proposed adjustments, allowing the FIA to impose a "freeze" on engine development.

So what was the only problem with the F1 engine freeze? Apparently not all the engine manufacturers provided completely accurate data on their engine's performance...

 

And that also explains why corrupt Renault won two championchips Smiley Smiley Smiley

The engine development was not limited when Renault won both championships.

A really weird thing about the engine development freeze is that the best engine of the 2006 (yes, the Renault engine) became one of the worst 18 months later.