This was the first time the cast iron block found in most newer 2-liter Opel engines was featured.

The 2007 season was the latest season to contain an entry with Opel engines, during that season Volkswagen entered the series.

The X16XE is an Opel engine.

About 20 examples were built, with all but five using the Opel engine.

It is being built by Spiess and is based on the company's Opel engine, but with some technical changes to lengthen the service interval and reduce running costs.

It featured an aluminum body and Opel engine.

It did not use the LA1 3400 V6 engine, but rather a selection of Opel engines (which had to be imported to the United States for assembly).

The X20XEV is an Opel engine.

The team used a Dallara chassis which was powered by Opel engines.

LX and early UC Sunbirds were fitted with a 1.9-litre Opel engine.