Hull number one was fitted with 1,300 hp MANs, the leanest engine package offered in terms of horsepower. Even so, at more than half-load with six people aboard and a full tower, I recorded a top speed of 36 knots. This is a smidgen faster than a 54 I tested in 1998 with similar power and no tower. At 2100 rpm, the 570 cruised at just less than 33 knots. The higher horsepower Caterpillar and MTU options are worth considering, and the folks at Bertram say speeds of more than 40 knots could be possible.