Quote:
Originally Posted by gmd2003
Actually the M5 in the Autozung test was on Pzero..... the new PZ4 is a faster tire and has pretty impressive grip , they came on my Turbo S and hands down they are softer/ faster AND less durable compound more temp finicky tire than the Michelin 4s or PSS . They do not however perform well in the cold , mine become bricks below 55 degrees .
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This is critical - temps and tire compounds. I can only comment that tires make a significant difference - and environment and very soft compound tires also has an affect as the PS4's are actually a much higher compound than the PZ4's and of course Pilot Sport Cup 2's.
This is why - testing two cars - it becomes critical to use the same tires in order to eliminate that factor as the differentiator to the outcomes of said test.