Final answer:
The car parked closest to the Beatles on the Abbey Road album cover is a white Volkswagen Beetle.
Step-by-step explanation:
The car parked closest to the four Beatles on the Abbey Road album cover is a white Volkswagen Beetle. The car is seen parked on the left side of the road, a few steps behind the Beatles. The other cars in the background are an Austin Princess, a Mercedes-Benz, and a parked taxi. The Beatles are walking in a line across the pedestrian crossing.