CHASSIS NO. 93A0070168
ENGINE NO. 6700185 / BTR 34117
French registration certificate
HIGHLIGHTS
Upgraded to RUF BTR II Specification by the Official RUF Importer for Switzerland in 1992
Documented Conversion per Factory Letter Noting RUF No. ZNS 1110
Featuring BTR II Engine with 397 BHP, 5-Speed Gearbox with Limited-Slip Differential, and CTR Brakes
Engine-Out Service by RUF Automobile in April 2024 Totaling €20,000
Equipped with Bilstein Suspension, RUF Anti-Roll Bar, and 964 RS Bucket Seats
SPECIFICATIONS
3,367 CC Single-Turbocharged Flat-6 Cylinder Engine
Bosch K-Jetronic Mechanical Fuel Injection
397 BHP at 5,800 RPM
5-Speed Manual Transaxle
4-Wheel Ventilated Disc Brakes
Front and Rear Independent Suspension with Coil Springs and Shock Absorbers
Originally delivered as a 1979 Porsche 911 Turbo, this Guards Red example was upgraded in June 1992 by Elite Sportwagen, the official RUF importer for Switzerland, to full RUF BTR 3.4-liter specification, supported by period invoices and factory documentation. The conversion included rebuilding the original 3.3-liter flat-six to 3.4-liter BTR II specification, allocating the RUF engine no. BTR 34117, and replacing the original four-speed transmission with the RUF five-speed manual transmission with limited-slip differential. Further enhancements included the CTR braking system with manually adjustable brake-bias control, a hallmark of the period BTR/CTR program.
The 1992 upgrade includes a RUF dyno dated June 13, 1992 and records the newly built BTR II engine delivering 402.5 PS (approximately 397 bhp) at 5,800 rpm (3.5 bar of boost) – an increase of approximately 100 bhp over the standard 1979 specification. A factory letter from 1999, signed by Alois Ruf, confirms the car’s configuration with its BTR motor, CTR-derived braking system, and distinctive four-pipe exhaust.
From 1992 to 1997, the car was maintained annually by the Swiss RUF importer. Through the late 1990s and early 2000s, it continued to receive regular Porsche dealer servicing, before entering a period of light use with periodic maintenance. In April 2024, the car returned to RUF Automobile GmbH in Pfaffenhausen for an extensive engine-out overhaul totaling approximately €20,000 per invoices on file.
Inside, the car features 964 Carrera RS bucket seats, harnesses, RUF-pattern carpeting, updated instrumentation, a RUF steering wheel, and integrated roll bar. Externally, the BTR is distinguished by its signature four-pipe exhaust, revised front valance, and striking 17" RUF Speedline wheels, giving it the purposeful stance characteristic of RUF’s turbocharged philosophy.
Accompanied by its original maintenance book, invoices, and correspondence – and showing just over 41,000 km since its RUF upgrades – this recently-overhauled BTR II stands as one of the most compelling and well-documented examples of RUF’s legendary performance conversions.
