Bit of a pootle round Scandanavia or the Alps in Winter on the Brick outfit (plus the obligatory collection of Dutch Gin and a trip to the super market in Calais):
Sidecar nose compartment 45 litres
Sidecar middle compartment 180 litres (full of Dog on UK trips)
Sidecar rear compartment 180 litres
Tool box ahead of battery compartment 9 litres
Canoe sack (tent) on mudguard 20 litres
Canoe sack on battery compartment lid 40 litres
Fake GIVI lookalike top box 40 litres
Tank bag (usually empty and in nose of sidecar) 30 litres
544 litres split 454 "hard", 90 "soft".
Should I also mention the racks with 20 litres of petrol, 2 litres of oil and three litres of water and coolant? I have of course followed the various lighweight travel threads on here and drilled holes in my toothbrush handle. I think this was a mistake though, the batteries seem to be leaking now!
Solo Triumph Bonneville, North Cape/Finland or Eastern Europe:
TT boxes 70 litres
Tent bag plus roll sack 20 x 20 litres
A miserly 110 litres of which 18% is full of tent

. Still it uses a tad less petrol!
Andy