So, let's take a look at the top 10 cheapest V8s for sale, and we'll rank ... the more-powerful "S68" V8. The 8 Series is the successor to the now-defunct BMW 6 Series, and resurrected the fabled ...

We are not sure about the actual output figures of this CNG-powered 650i. But back in its day, the 4.8-litre V8 petrol engine on the coupe used to churn out 362 bhp and 489 Nm! It could sprint to 100 ...