www.teamdelsol.com Click on FAQ and you find a lot of helpful information about the sol.

93 S 1.5L non-VTEC engine 102hp
Si d16 1.6L SOHC VTEC engine 125hp

94-95
S 1.5L non-VTEC engine 102hp
Si 1.6L SOHC VTEC engine 125hp
VTEC 1.6L DOHC VTEC b16a3 engine 160hp

96-97
S 1.6 non VTEC engine 106hp
Si 1.6L SOHC VTEC engine 127hp
VTEC 1.6L DOHC VTEC b16a2 engine 160hp

93 sols just have driver air bag. 94-97 Dual airbags
95 introduction of trunk release, low fuel light, power door locks

Again, check teamdelsol for more history about the sol.