The Alfetta sedan was the last RWD chassis developed by Alfa Romeo in the 1970's
The Alfetta GTV , Guillietta and Alfa 75 Also used this chassis
By 1985, the Alfetta was at the end of its end of its production life and replaced by the Alfa 90 that year. The car offered to you appears to be a 1984-5 Quadrifoglio Injection . If so it was top of the range of the last cars made. (Should have A/c and sunroof if World Cars 1984 is correct)
The Chassis used is an expensive one with engine at front and Clutch and gearbox at rear. The rear De Dion suspension sticks to the road very well and the front has initial understeer requiring more initial turn in before the front wheels "bite" and the car begins to turn into a corner.
The overall Balance of the car is excellent.
The car is a relatively robust. Not sure of Rust problems this late in the Alfetta's life cycle.
The 2.0 Motor is a strong unit but can suffer from Head gasket failure. Also being an All Alloy engine can suffer corrosion if coolant system not looked after. (Often the reason the head gasket failed)
Syncros on the gearbox were weak and with the gearbox at the rear, took more punishment as took a longer time for oil to heat up.
Rubber drive shaft "donuts" wear as the driveshaft turns at engine revs as clutch is at rear. There are 3 "donuts" and if the front one fails then serious damage can be done so important to keep these in good condition.
Supension relatively robust. Some good Adjustable shocks such as Spax externally ajustable ones are good value. and the use of the 195*60*15" tyres and 6" rims as used on the Alfetta GTV would also be very good idea (assuming not aready done).
If you like the look of the car and the way it drives then as always up to you .
I had the GTV version called the Alfetta GTV
(bought new in 1983) for 19 years.
this was essentially a rebodied Alfetta sedan as used same chassis, engines and suspension.