Engine management systems now use microprocessors (the chip!) resulting in the first use of real-time sensors in mainstream automobiles

All odometers have 7 digit fields, and can now register over 100k miles

Electronic fuel injection is the dominant fuel delivery system, phasing out carburetors

Cars now run on unleaded gas, as lead was found to be lethal for catalytic converters

Tachometers and the rev limiter are widely standard, thanks to the new engine management system. The “redline” becomes more widespread as well.

First use of AWD in passenger cars, partially fueled by homologation requirements in racing

Aerodynamics play a more important role in mainstream performance cars as manufacturers experiment with different wings, lowered stance, and much smaller grilles in the front bumpers

Turbocharging gains massive popularity from involvement in racing, and as tightening emission regulations force engine displacement to decrease

Headlight housings made the switch from glass to plastic, which was cheaper and more resistant to wear and tear. American market cars finally utilize replaceable bulbs