Just look at the following 90s sport car in a black paint with grey interior.
This project is a good answer to the eternal question "Is it possible to make a good connection of LEGO TECHNIC and LEGO CLASSIC bricks?" Of course, it is and here is the example! (Model contains approx. 1000 parts).
It has a working differential, front and rear suspension.
The engine cylinders are working during rear wheels movement.
The steering wheel is fully operational. You can easily open doors, hood and trunk lid.