: 4.2L 140 hp (104 kW) I6 1945 Maybach JW61 : 3.8L 145 hp (108 kW) I6 W2 were the 5.7L inline six engines built for and ordered by Spyker . Not all were purchased, and Karl had to build cars featuring the engines to offset costs. Around 1800 Maybachs were built before WW II.