That's Diana Rigg in the role of Emma Peel and her Lotus Elan in the British TV series "The Avengers." I find it difficult indeed to image how Diana Rigg could be improved. Same goes for the Lotus.
The Lotus Elan was produced 1962-1973, and to my way of thinking, the best-looking ones were the early two-person versions. This is not to say that it would be impossible to design a more attractive sports car with the same dimensions as the Lotus using a different styling theme. My point is that there is essentially nothing I can think of that could significantly improve the existing theme of the car.