Bitter SC

Bitter was produced in Germany and later Austria. The founder Erich Bitter, a former race car driver turned automobile tuner, importer and ultimately designer began crafting his own vehicles after business ventures with Italian manufacture Intermeccanica soured.
(from Wikipedia) The Bitter automobile company produced vehicles between 1973 and 1989. Since 1984 several prototypes have been created by Bitter with an eye on possible low-volume production, but none of the plans came to fruition. Most recently Bitter displayed a Holden Monaro based CD2 at the 2003 Geneva Motor Show.
Like the CD, the SC was based on Opel's biggest contemporary model, this time on the Opel Senator, and was sold from 1979-1989 as a coupe, sedan and convertible. The SC was powered by a fuel-injected Opel 3.0 l-I6 (177 hp) or a bored-out 3.9 l-I6 that developed 207 hp (154 kW). Body design seems to have been heavily influended by Ferrari`s 400i.
The first SC model to appear was the Coupe (1979), followed by the Convertible (1982) and the Sedan (1984). Production lasted until 1989 with 461 Coupes, 22 Convertibles and only 5 Sedans built.
The ultimate failure of the Bitter brand was rooted in its business model. As was popular in the late 1970s and 1980s, rebodied vehicles from other manufactures gave rise to smaller automobile companies. The Bitter vehicles were based on components from Opel. This approach became unpopular in the late 1980s and doomed the brand.
Characteristics. Body : length/width/height/wheelbase – cm (in) : 485/182/135/269 (190.9/71.7/53.1/105.7); weight : 1350 kg (2980 lbs).
Engine : 6-cylinders 2968 cc (181 cid), front-mounted, 3-speed, automatic; rear-wheel drive. Power : 177 bhp @5800 rpm. Top speed : 193 km/h (120 mph).