The car came with an aftermarket tape deck. Much better than the stock AM/FM stereo.
It warms up great in -35C weather. Only taking five minutes of driving to have wonderful hot air. It even started trouble free in -40 weather, when not plugged in.
My car came with a rear window wiper. This makes driving in the rain and snow more enjoyable.
I found that newer Chevy Sprints (Suzuki Swifts) came with larger 13 inch wheels. The 1989-1992 came with 12 inch wheels. I put the 13's on my 1989 and it really grips. This modification increased traction, because I am running a wider tire, and increased gas mileage, because I am using a taller tire (larger gearing). However, the larger tires cause less performance when accelerating.
I am 6 foot 4, and find the Sprint very roomy and comfortable.
Top speed that I have achieved is 155km/h.
I would prefer a five speed manual to the three speed automatic.
I put a fifth seat belt in the back seat so that the car can hold five occupants. This has come in handy.
I am considering converting my car to electric when the engine dies, but I don't know if the engine will ever die.
Canadian Electric Vehicles offers kits to convert a Sprint to a 120hp electric vehicle. This is their web site: http://www.canev.com/index.html
This car gets better gas mileage than the new hybrids built by Honda and Toyota.
This car is the best by on the market. Best bang for your dollar.