The first generation of 5 Series models was introduced in 1972 and established them as serious contenders in the mid-sized saloon market. The second-generation introduced in 1981 built on this reputation. Tuning firms produced expensive and exclusive versions although the standard cars had good performance. The astonishing turbo diesel 524td set performance and refinement standards for diesel passenger car engines. Here are the contemporary road test and model introduction articles, tech. and spec. data, drivers' impressions and comparison tests. Models covered include: 528i, 525i, 528e, 520i, 533i, Alpina B9, 525e, Alpina B2.8, 533i Turbo, Hartge H5S, M535i, 518i, 535i, 524td, 528iSE, AVA M535i, M5, 520i Lux, Alpina B10. 1