The 635CSi is a luxury sports coupe produced by BMW from 1982 to 1989. It is part of the BMW 6 Series and is known for its sleek design and powerful performance. The car features a 3.5-liter inline-six engine, providing a balance of speed and comfort, making it popular among enthusiasts. With its distinctive styling and advanced technology for its time, the 635CSi became a symbol of 1980s automotive excellence. It offered a spacious interior and a range of features, including leather upholstery and advanced audio systems, appealing to drivers seeking both performance and luxury.