But underneath the new A is perhaps the world s best example of the virtuous circle approach to automotive engineering. It s light. Really light. So it s an aluminium bo.d, aluminium chassis d, aluminium suspended sports car that has a modest . litre turbocharged four cylinder engine..That s the question the Alpine A S poses. The A, on which it s based, is one of the most complete sports cars on sale today, combining .Read the definitive Alpine A review from the expert What Car? team. Check specs, prices, performance and compare with similar cars..