Date registered: Dec 2003
Vehicle: 1965 220S, 1999 Volvo V70 (wagon), 2006 Ford Crown Vic Police Interceptor, 72 350SL 4 Speed
Location: Near Manassas Va.
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You can expect 3000 to 3200 RPM at around 60 mph. Don't worry, these engines are tough and made to take the high RPM. Make sure the valves are properly adjusted and this engine will purr. My 220SEb turns over 3400 RPM at 100 KPH, approx 60 mph. These days engines operate at lower speed and more open throttle plate for mileage.