Acceleration measurements from a standstill are not as easy to achieve for laypeople as for professionals. Even with automatic machines, you have to hold the converter just before the brake speed so that things get straight to the point. With switches you have to clutch hard but jagged and tear through the gears. All things that are "brutal" even in a new car and have a risk of failure
A good "performance test" that can be carried out easily and stress-free during test drives is the maximum speed achieved (210 at 6300 rpm) and the thrust value in 4th or 5th gear (from 50-120, or 80-150 depending on which measured values are available )
And an E36 320 was never a "sports car", the car is too heavy for that. But with a power-to-weight ratio of around 10kg / PS, the car is quite well motorized. The 320 was bought earlier because it was the cheapest 6 cylinder or lastly the last row 6 on the market and the 2.0 liter runs silky smooth on the one hand and on the other hand still has the old speed engine behavior so that you have a sliding step to maintain fuel savings up to 4000 rpm and from 4000 rpm the afterburner is ignited. Then the engine gets down to business, gets louder and starts drinking.