Synonyms for Jalopy:

n.

wreck. artifact (noun)
bus, heap.
jalopy (noun)
bus, heap.
old, dilapidated automobile (noun)
heap, wreck.
vehicle (noun)
brougham, boat, hearse, sledge, bicycle, car, ship, van, vehicle, wagon, fire engine, station wagon, bus, conveyance, motorcar, truck, train, sled, taxi, tractor, coupe, boxcar, landau, ferry, ambulance, gondola, sedan, cab, coach, limousine, taxicab, roadster, auto, stagecoach, automobile, barge, convertible, motorcycle, jeep, buggy, armored car, cart.

Other synonyms:

wreck. Other relevant words:
heap, wreck.