To add what was posted earlier about the VX... It was a bare bones hatchback produced from 92-95 that weighed only 2094 lbs The EPA estimates were 48/55 for the 49 state 5 speed. The CA version did not have lean burn due to the increased NOx and subsequently had lower EPA numbers. The VX also has an EGR system which the other hatchbacks did not have. Other differences were drivers side mirror only, factory grille block, rear underbody diffuser, front underbody tray, oil warmer at the oil filter, 13" alloy wheels (9lbs each) and a 10.6 gallon fuel tank (11.9 gal on std on DX).
The final drive is 3.25:1 which is identical to the CX version which was rated at 44/48. While the VX had the VTEC-E leanburn engine, the CX has the 70hp 8 valve engine. The difference in EPA estimates can be attrbuted soley to the lean burn technology.
Sorry for rambling, I just love this car.