My first car was a Cadillac , and my brief ownership experience seems today more like a Hollywood fantasy than a serene cruise through Britain’s drizzle in 1989. A 1967 Deville convertible, it did 10mpg because of its gigantic, 7.2-litre V8 engine and at almost 19ft long and 6.6ft wide it was truly a bollard-scraper. On a memorable holiday driving from London to Barcelona it never missed a beat. And because of its tank-like construction, all its ageing gadgets – folding roof and electric