Die Atombomben der Bundesrepublik: An Oral History of Germany's Nuclear Weapons Program

Maybe if you replace the original motor with a more powerful and modern motor...?
The final versions of Tabant from 1989 to 1991 had 1.0L engine of VW Polo. Whent Trabant 601 had top speed of 100, then VW engined Trabant 1.1. had top speed of 125 km/h and had about 22 seconds from 0 to 100 km/h.

And the worst car in GDR was not a Trabant, that "honour" goes to a Range Rover of The British Commanders'-in-Chief Mission to the Soviet Forces in Germany (BRIXMIS) , that particular SUV had its carburetor in wrong settings. There is a story about the Range Rover going at It's full speed on the Berlin ring road, when it was supassed by heavily loaded Trabant with full luggage rack and loaded light trailer.