REVIEWS: BMW M3 CSL • BMW M1 • BMW M3 • BMW M5 • Porsche Boxster • BMW Z4 • Honda S2000 CHALLENGE: Volvo 240 attempts to jump four caravans There is a BMW frenzy on the Isle of Man. The new M3 CSL and some BMW classics: the M1, BMW's one-and-only mid-engined car to date, the M5 series 2 and the classic M3.Also on the Isle of Man, three sporty convertibles are driven and the lads squabble over which is the best: the BMW Z4 championed by Richard, the Porsche Boxster by James and the Honda S2000 by Jeremy. A new Stig is introduced and Stephen Fry is the Star in a Reasonably Priced Car.