Tesla’s competition with Porsche, in which it set a new lap record on Germany’s racetrack, has reignited a controversy about the value of lap times, as the difference in conditions made the value of lap times debatable.

Axar.az reports citing foreign media that Porsche and Tesla are battling to establish supremacy in lap times for four-door electric sports cars, but comparisons are not exact, as conditions, ranging from car modifications to tire types, vary with each test.

“We want to have circumstances that can be understood and replicated,” said Nürburgring spokesman Alexander Gerhard, adding that the racing circuit operator had moved to tighten rules by which a carmaker can claim a certified lap time.

Automakers use the Nordschleife, one of the world’s most treacherous courses with 40 right-hand and 33 left-hand turns, to hone a vehicle’s sporting characteristics and burnish a car’s image for marketing purposes.