Quality Slider Equivalence?
-15 quality: South American and Soviet cars and engines based on decades old American and European designs.
-10 quality: A car or engine built as a modification of an older generation design, such as the Volkswagen Beetle in the 1960s.
-05 quality: A car or engine with less extensive engineering and lower quality components and machining.
000 quality: Production cars.
+05 quality: BMW and Mercedes-Benz. Production cars (where applicable) and engines modified for consumer racing, such as homologation models.
+10 quality: Ferrari, Lamborghini, and other supercar companies. Production cars (where applicable) and engines with extensive modifications for professional racing such as NASCAR, etc.
+15 quality: Race cars and engines.