250 bhp, 3,442 cc DOHC inline six-cylinder engine, triple SU carburettors, four-speed manual gearbox with Laycock de Normanville overdrive, independent front suspension with wishbones, coil springs, torsion bars and anti-roll bar, rigid rear axle with semi-elliptic leaf springs, and four-wheel hydraulic disc brakes. Wheelbase: 102"

- One of only 104 XK150 S 3.4-litre DHCs originally built

- An older and well-maintained restoration

- Offered from a private Swiss collection

Introduced in the fall of 1957, the XK150 was a more than worthy competitor for the BMW 507 and Mercedes-Benz 300SL, and as the final evolution of its series, the XK150 was the best and most highly developed. Styling was updated with a higher beltline while race-bred four-wheel disc brakes – the first fitted to any series-production car – provided stopping power to match the car’s prodigious performance.

In the spring of 1958, the high-performance “S” model was introduced, featuring a Harry Weslake-modified straight-port cylinder head, three SU carburettors, 9.0:1 compression and more-aggressive camshaft timing. Every “S” came standard with a four-speed manual gearbox and overdrive, and with 250 bhp on tap, the 3.4-litre “S” could exceed 130 mph.

Only about 2,700 XK150 Drophead Coupés were built through mid-1961, of which only 104 were built with the 3.4-litre “S” specification. Finished in red with a black interior, this example was purchased by the current owner in 1988 from a Geneva resident who had acquired it from a Mr. J. Cassidy, an Irish gentleman who imported the car into Switzerland two years earlier. Following his acquisition of the car, the current owner commissioned a full restoration, which was completed in Switzerland in 1991 at a cost of 122,000 CHF. Upon completion, the car joined the owner’s private collection, and although it has been used quite sparingly, it has reportedly been well maintained ever since. It was first registered in Switzerland in 1994 and has regularly passed its technical inspections, including its most recent one in 2008.

An RM specialist recently noted that the car started easily and that the engine did not smoke even when cold, settling into a nice idle. With its high-performance specification and rarity to complement its timeless design, this XK150 possesses the greatest qualities of any Jaguar – performance, elegance and a thrilling driving experience.