Our v-drive has 3800 hours on it not including the additional thousands of hours of free wheeling under sail. It has never given us an ounce of problems and I much prefer it for maintenance as I can pull our prop shaft in about 8 minutes with the coupling still on it and alignments are easier too.. A set of modified stuffing box wrenches makes adjusting the stuffing box no more or less difficult than many boats with a non reversing gear. Modifying my wrenches took about 4 minutes with a 4" angle grinder and cut off disc...
Like anything a v-drive is as good as the care it received... I see piles of Hurth HBW or Kanzaki boxes destroyed each year all usually due to improper use or maintenance...
Having owned many non-v-drives and currently owning a v-drive I see ZERO differences in reliability.
I actually prefer the v-drive over straight for a number of reasons...
*Easier alignments
*Easier gear box fluid changes (yearly or bi-yearly, takes me 3 minutes...)
*Easier shaft removal (some models where shaft passes through gear)
*Easier shifter adjustments
*More room on fore end of engine bay
*Easier access to HX on many engines for zinc changes, fluid changes etc.
*Gear can be removed with engine in-place for damper plate replacements etc.
*Easier access to on-engine fuel filter, pump etc. (our engine specifically)
*Easy access to exhaust elbow for removal / inspection or replacement.
*Moves engine driven refrigeration compressor to the aft end of the engine bay making for more room in the forward area
That said I tend to prefer the Tartan 34, especially if it is well kept, they are beautiful boats that also sail beautifully and handle rough weather with ease.. Sparkman and Stephens knows how to design boats.... The Cal 34 is a good sailing boat but I just prefer the T-34C...
Keep in mind that a T-34C has LOTS of exterior teak so if you want to maintain that beautiful heart stopping S&S look she will require some work to keep her looking ready for the prom...
Think about which boat you want to row up to in the anchorage? Which boats lines will sing to you. Most importantly buy a boat based on the three "C's" CONDITION, CONDITION, CONDITION....
Many people pee their pants when they hear "A4 gas engine". To me is spells GREAT POTENTIAL DEAL!!!! There is NOTHING wrong with an A4 despite all the naysayer's....
They are quiet, don't vibrate, are easy to work on, reliable, parts are easily available and they have a tremendous owners support group over at Moyer Marine.
There are a few necessary mods but once those are done you can expect many, many more years of reliable service. Many T-34C's came with A4's and some later ones came with diesels.. If the boat is in good condition don't turn it down over the engine but DO NOT over pay for a gas engine as the vast majority of uneducated/inexperienced boat buyers do not want one.
BTW I know of a pretty nice Pearson 30 recently re-powered and painted. The catch? Her decks are we near the chain plates and no insurance company will insure her in her current condition. Boat is now derelict because to repair the decks exceeds the value of the boat by about 2X... My point here is that a new engine is but one SMALL dynamic in over all boat condition. This P-30 has recent Awlgrip and a repower but is still an uninsurable boat.