In 1990, LEGO released 7 Technic sets across 2 subthemes, all of these sets have been retired. Subthemes for that year included Supplementary and Universal. For that year, the total price of all retail sets cost $289, today those sets are valued around $1,136, a growth of 293%.
Most valuable 1990 LEGO Technic set
8094 Control Centre $465.92
Highest growth 1990 Technic set
8850 Rally-Racer +449.21%
Most owned 1990 Technic set
8825 Night Chopper
7 sets

8064 Universal Motor Set

Theme / Subtheme Technic / Universal
Year 1990
Pieces 219
Availability Retired
8064 LEGO Technic Universal Motor Set
Retail $54.99
Value $125.25
Growth  +127.8%
Annual growth 2.3%

8094 Control Centre

Theme / Subtheme Technic / Universal
Year 1990
Pieces 546
Availability Retired
8094 LEGO Technic Universal Control Centre
Retail $99.00
Value $465.92
Growth  +370.6%
Annual growth 3.7%

8720 9V Motor Set

Theme / Subtheme Technic / Supplementary
Year 1990
Pieces 57
Availability Retired
8720 LEGO Technic 9V Motor Set
Retail $35.99
Value $79.46
Growth  +120.8%
Annual growth 2.9%

8825 Night Chopper

Theme Technic
Year 1990
Pieces 116
Availability Retired
8825 LEGO Technic Night Chopper
Retail $8.99
Value $40.00
Growth  +344.9%
Annual growth 3.0%

8830 Moon Buggy

Theme Technic
Year 1990
Pieces / Figures 171 / 1
Availability Retired
8830 LEGO Technic Moon Buggy
Retail $19.99
Value $86.94
Growth  +334.9%
Annual growth 2.6%

8840 Rally Shock n' Roll Racer

Theme Technic
Year 1990
Pieces / Figures 225 / 1
Availability Retired
8840 LEGO Technic Rally Shock n' Roll Racer
Retail $29.99
Value $119.00
Growth  +296.8%
Annual growth 2.7%

8850 Rally-Racer

Theme Technic
Year 1990
Pieces / Figures 354 / 1
Availability Retired
8850 LEGO Technic Rally-Racer
Retail $39.99
Value $219.63
Growth  +449.2%
Annual growth 4.8%