Back in 1983 Tesco and Leyland joined forces to bring us this revolutionary streamlined advance in commercial vehicle design – the Tesco Leyland Economy Vehicle. Or, to be more exact, a Roadtrain with roof spoiler and not much else.
According to the news story, which appeared in Motor Transport at the time, it reduced drag by 25%. This equated to an impressive £2,000 per year.
How much of the 25% improvement is attributable to the go-faster stripes is unclear.