For 1995, the special limited edition 850 T-5R was offered, and was a commercial success, leading Volvo to produce a second run in 1996. Originally, it was to be called 850 Plus 5. The vehicle was based on the 850 Turbo, utilizing the B5234T5 engine with a special ECU (Bosch #628 in U.S and #629 in EU) that added an additional of turbocharger boost pressure, giving the engine an extra for a total of and of torque. The engine was mated to a 4-speed automatic transmission or 5-speed manual transmission, the latter of which was not available in the United States. The T-5R was renowned as a sleeper car; despite its boxy, understated appearance, it boasted a drag coefficient of 0.29 and was capable of accelerating from 0 to in 5.8 – 6.0 seconds (depending on transmission and body type). The top speed was electronically limited to . The vehicle came standard with Pirelli P-Zero tyres, providing lateral grip of 0.88 g. The engine tuning was co-developed with Porsche, as was the transmission and other powertrain components. Porsche also aided in designing some of the interior, such as the Alcantara seat inserts. These cars came as standard with nearly every feature available, only a handful of options – such as heated rear seats – were available. On the North American market only two options could be chosen, a trunk-mounted Alpine 6-CD changer and no-cost 16" wheels for a smoother, more comfortable ride and driveability in snow when using all-season tires.