All cars must use a 5.0-litre, naturally aspirated V8 engine.

The new rules required a 3.5L naturally aspirated engine to be used.

This is also the most powerful production 1.6l naturally aspirated engine.

The naturally aspirated 3.5-litre engine is also available in some of these markets.

It is very respectable performance for naturally aspirated 1.1L engine.

Once you've overcome starting the naturally aspirated R8, it's normal to drive around town.

It uses a 65 degree V12 naturally aspirated petrol engine.

This naturally aspirated V8 will also be used to replace most of the "55" models.

The naturally aspirated came as standard issue with the W58 manual transmission.

The only model available was the naturally aspirated petrol 1.0, with five doors and the high roof.

Both cars were to be powered by naturally aspirated V-8 engines.

In 1991 the naturally aspirated diesel engine was dropped from the 4x4 program.

A total of 654 naturally aspirated 3000Ms were built, including both the standard and luxury trim levels.

The engine is, and always has been, naturally aspirated.

On the surface, the Walter engine was a naturally aspirated diesel.

The B190 was the team's first naturally aspirated car to feature the air box located above the drivers head.

It is powered by a naturally aspirated 2.5-litre 168 hp engine.

The naturally aspirated cars had two different I-4 engines depending on the market they were produced for.

Both versions were available in either naturally aspirated and turbocharged form.

The 1999-2003 models were the same 1602 cc naturally aspirated engines.

It is close to the limit for a naturally aspirated gas burning engine.

To get the auto transmission you have to buy the model with the 1.5-litre naturally aspirated petrol engine.

The concept had a turbocharged 3-cylinder; the production car will have a naturally aspirated 4-cylinder.

The naturally aspirated models are available with a manual or automatic transmission.

As far as naturally aspirated engines go, this what is available.