Traditionally I have regarded Volvo Penta as market leaders in the pleasure boat industry perhaps not on the forefront of technology but not so far behind and the reliability compensated for the 'tried and tested' technology.
In recent years the reliability appears to have slipped slightly and I urge everyone attending boat show stands to make enquires specifically mentioning the warranty, the intention is to put a little pressure on the manufacturers to improve their warranties........
Volvo Penta 12 months + 12 months = 2 years
Nanni 24 months + 12 months = 3 years
Yanmar 12 months + 60 months major parts=5 years
Cummins-mercruiser 24 months + 72 months major components = 6 years
Full details here
Of course this is all just my opinion , quick selective skim read so could include errors, mistakes and cockups, if you dont agree feel free to say so I just thought it a bit rich that Volvo Penta expect you to act as a guinea pig for testing a new engine design and then expect you to pay for their cockups.