Tesla's Nuerburgring run revs up debate over speed records

FRANKFURT (Reuters) - Tesla Inc's attempts to humble Porsche with a new lap record on Germany's legendary Nordschleife racetrack have reignited a controversy about the value of lap times, as the circuit steps in to quash claims of cheating.Porsche and U.S.-based Tesla are battling to establish supremacy in lap times for four-door electric sportscars, but comparisons are not exact, as conditions, ranging from car modifications to tyre types, vary with each test."We want to have circumstances..