The company best known for its vacuums and domestic appliances bought the disused airfield at Hullavington two years ago.
Dyson has already renovated two hangars built in 1938 at the 517-acre site.
That redevelopment has cost £84m and the next phase of the airfield's development would take Dyson's total investment to £200m.
About 400 automotive staff are now based at Hullavington and a further three buildings will open in the coming months, offering an additional 15,000 sq m of testing space.
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Jim Rowan, chief executive of Dyson, predicted that Hullavington would soon become a "world-class vehicle testing campus".
"We are now firmly focused on the next stage of our automotive project strengthening our credentials as a global research and development organisation," he said.