Dutch sports car manufacturer Spkyer debuted the 2018 Spkyer C8 Preliator Spyder, a low-production, carbon fiber-bodied convertible. The new car will ditch the supercharged 4.2-liter Audi engine that Spyker has employed in the C8 since 2000 and will instead trade up to a Koenigsegg-built 5.0-liter V-8. The new engine is expected to produce 600 horsepower…