R1100GS 1999 vs 1390 Super Adventure S 2025

If straight-line speed is your priority, the 1390 Super Adventure S takes the lead. With 90 HP more than the R1100GS, it offers a more spirited ride that will be noticeable on highway overtakes or track days. When it comes to agility, the R1100GS has a clear advantage. Weighing in 7kg less than the 1390 Super Adventure S, it will feel significantly easier to handle in low-speed traffic, parking maneuvers, and twisty corners. Bottom Line: While both are capable, the 1390adventure offers a superior power-to-weight ratio, making it the more exciting machine for experienced riders.