The B280F is a thorough renovation of the earlier motor (B27/B28).

The heritage of the first V6 was that it was designed as a V8 and when the Arab oil embargo happened they (Peugeot-Renault-Volvo) did a quick change and modified it to be V6 The cylinder bank-bank angle is 90 which makes the shared rod journal crank have odd angles between cylinder firings. To cure this the engine had a mild cam grind on one bank and a radical grind on the other so the firing before the long span would be strong and the firing between the short span would be weak in order to hide the unequal interval shakes at idle.

Okay. This leads us to the B280F V6 in the car you are considering.

It has a crankshaft with "splayed" rod journals to make the firing intervals be an even 120 degrees apart. The heads have oil troughs which the cams dip through and get oiled before the oil supply reaches the rodker arms and drips off to oil cam lobes (No more short cam life).

The fuel system is an electronic fuel injection that is a version of that used on the 4 cylinders with good reliability. The bottom end of both iterations of the V6 is bulletproof. The timing chains seem to have a lifespan of over 250K miles. The front cam chain cover gaskets can leak as can the front crank seal. Neither of these items is any different from any other timing chain OHC motor.

There are very few interchangeable parts between the motors so don't let anybody scare you with stories they've heard about somebody who had a V6 Volvo and how bad it was. The 87-90 motor is a whole 'nother story.