Complex sentence: A new Mini Cooper was briefly relaunched from 1990-1991, with slighter lower performance than the 1960s Cooper, 1,000 examples of this type were manufactured with a 63 bhp (47 kW) 1275 cc engine.
Split into simpler sentences: A new Mini Cooper was briefly relaunched from 1990-1991, with slighter lower performance than the 1960s Cooper. A thousand examples of this type were manufactured with a 63 bhp (47 kW) 1275 cc engine.