21. Later in 1984, a normally aspirated engine was introduced in the 9000 and 9000 S models, producing. 22. This was the first race where the IRL used their brand new cars with normally aspirated engines . 23. Lotus, along with other competitors, now had to incorporate 3, 500 cc normally aspirated engines into their cars. 24. The locomotive weighed 70 tons on three axles and was powered by the Rolls-Royce DV8N naturally aspirated engine . 25. The IRL, in only its second year, is introducing all new chassis and normally aspirated engines this weekend. 26. Teams can choose to use the NGTC 2.0 litre turbocharged engine, or S2000 2.0 litre Naturally aspirated engine . 27. The BTCC Cruze used the 2.0-liter naturally aspirated engine found in the original variant of the WTCC Cruze. 28. It marked the introduction of a new production-based, normally aspirated engine formula as well as a new chassis design. 29. Using a stroker crankshaft from Toda Racing, the naturally aspirated engine displaced 3.5 liters and produced nearly 500 bhp. 30. And the consensus is that the naturally aspirated engine sounds sort of like a muscle car, circa late 1960s.
