1984 - brazilian Amyr Klink crossed (alone) the South Atlantic in a rowing small boat.
No sails, no engine.
LOA: 5.94 m
Displacement: 1200 kg
Propulsion: human muscles (ocean streams also helped)
Fuel: dry food and water (soft)
Duration: 100 days
Distance: 3500 nm
Oops, doesnt fit this thread requirements. Not a motor yacht, no comfort and no crew.