The truck maker has already been able to rebuild part of the engine factory, but needs additional investment to build new, more efficient engines.
It marks the opening of the company's £190 million engine factory which will both secure jobs and create new ones.
But engine factories are designed to churn out 500,000 or more engines a year.
"I was sent back to the engine factory."
Audi's decision, for example, will ultimately create 1,000 new jobs here and will cost its engine factories in Germany roughly the same number.
The engine factory is also located on the Aura riverbank.
The engine factory is an industrial heritage site, complete with functioning production lines and offices.
At one point he became involved in lawsuits and had to close his engine factory.
Gray was doing preparations for more business operations, including the establishment of a stationary engine factory when he died in October 1855.
After graduation from high school he was working for one year at an engine factory in Ludwigshafen.