For power, two MAN diesel options are available: twin 1,800 hp V-12s or 1,900 hp V-12s. Both are hooked up to V-boxes. The first 850 had the bigger engines, and when we wound her up to the maximum 2,350 rpm, she managed 29.6 knots on a barely rippled Med — not too far off the quoted 31-knot top end. We were fairly heavy, with full fuel, one-quarter water, two Seakeeper 9s and 12 souls. Fully loaded, her spec says she weighs in at slightly over 170,000 pounds.
For relaxed passages, I suggest 1,000 rpm on the engines and a cruise speed of 10 to 11 knots. Better still, try 8 knots at 750 rpm. Cruising is not racing.