ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins65% CONFIDENCEOverall confidence: 65%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
One account has driver Mike Strasburg certified at 351 km/h on 22 August 1991 while another gives 340 km/h (211 mph) and both agree on a 1991 class win; another says an earlier attempt failed in 1989 and a further run followed in 1992. The 22 August date comes from a single source.[1]Colani's streamlined, Lotec-built Ferrari Testa d'Oro ran at Bonneville in August 1991 and won its class at roughly 340 to 351 km/h, with Colani following by fax from Switzerland. Sources disagree on the exact speed.
1.00