Background
BMW’s Z3 Roadster was launched in 1995 as a more affordable (and cheaper to build) step on from the first Z Series car, the door-dropper Z1.
The Z3 started off life with a choice of two fairly humdrum four-cylinder engines. Enthusiasts who associated BMW with performance had to wait two years for bigger six-cylinder versions to arrive. Even then, they weren’t really fire-breathers, but BMW’s established M Series technology came to the rescue in 1998 with the Z3 M Roadster, a genuinely high performance version of the BMW Z3 powered by the 316bhp S50 3.2 inline six from the E36 M3 saloon and coupé.
All Z3Ms were built in BMW’s factory in the US, using M drivetrains brought over from Germany. Ironically, US customers were given short shrift with the home-market Z3M Roadsters: their S52 version of the 3.2 six only mustered 240bhp.
Although the UK-spec S50 motor was replaced in 2001 by the marginally more powerful S54 unit, there was very little difference between the two in terms of performance. The S50 M Roadster did the 0-60mph dash in 5.4sec (compared to 5.3 for the S54) and charged on to a governed top speed of 155mph. Its peak power was produced at a spinetingling 7400rpm.
You could tell the Z3 M apart from the standard Z3 models not only by its different bumpers, gills, bootlid and mirrors but also by its wider track front and rear and its lower stance. Altered suspension geometry, standard limited slip differential and a thorough beefing up of the whole chassis including big vented brake discs all round further distanced the M cars from the regular models.
It's thought that fewer than 1000 right-hand-drive S50-engined M Roadsters were built in its 3-year production run. It’s a rare car.







