For a comparison of the various Z models over the years, refer to this table one of our TIZCC club members put together. http://www.tizcc.ca/zeds.htm Specifications are as published by Road & Track... I own both a 72, and an 83 ZXT 2+2. The 240 is a sports car with no frills. The ZXT is a cruiser. Most noticable difference between the 2 models are the creature comforts on the ZX that we take for granted in our daily drivers (Air, cruise, power steering, windows etc.). I like them both for what they are. Neither are for sale....(sorry Carl:) ) GWGarrard