Max speed 85 knots (allegedly) from
http://www.xsmgworld.com/xsr48/index...=xsr_spec&i=xs
Standard (1600 bhp): 2x 11.3 L Isotta Fraschini L1306 - 588 kW
Option 1 (1900 bhp): 2x 10.3 L Seatek 950 Plus Bi-Turbo - 698 kW
Option 2 (1700 bhp): 2x 13.0 L CAT C13 Turbo - 624 kW
Option 3 (1640 bhp): 2x 10.3 L Seatek 820 Plus Turbo - 603 kW
Maximum speed : from 70 knots (standard specification)
up to 85 knots (subject to engine and boat specification)
Cruising speed: 50+ knots [60+mph/90+kph]*†
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