Complex sentence: The Miura was originally conceived by Lamborghini's engineering team, which designed the car in its spare time against the wishes of company founder Ferruccio Lamborghini, who preferred powerful yet sedate grand touring cars over the race car-derived machines produced by local rival Ferrari.
Split into simpler sentences: The Miura was originally conceived by Lamborghini's engineering team, which designed the car in its spare time against the wishes of company founder Ferruccio Lamborghini. He preferred powerful yet sedate grand touring cars, rather than the race car-derived machines produced by local rival Ferrari.