It's very hard to compare across eras - the 1986 team would ahve been huge, and slow, and weak physically relative to 2008 let alone 2024 teams. The defensive rules are different, handchecking is different, conditioning is different, use of 3pt is different, etc. So what I try to do is ask "how was this team relative to others of its era" and assume that across eras, elite players would always adapt to rules/style of play. One can disagree with that and say "today's players are just better" and I get that - but personally don't find that an interesting approach.
So, that stated, the biggest thing for the 1986 team is they are a dominant offense and fast-break team relative to any recent Celtics team. The 2008 team was, imo, the best defensive team (though clutch-time 2024 Celtics were close). For me, the thing the 1986 Celtics would have done is rebounded, run, and beaten up anyone after them. If you look at the 2008 Celts, Garnett would have been able to stick with McHale....but Bird would have destroyed them, and Perkins would have struggled with Parish's running. They are a bit like this year's roster in that the other (non-Walton) bench guys were less great players than great fits---Wedman and Sichting are not that unlike Hauser and PP. And instead of versatile Al, you have occasionally dominant Walton.
Any combination of those would be fun to watch play, and all were quite dominant in their season. But for me, the 1986 Celtics had a combintion of elite play and versatility offensively that would have put them over the top
So, that stated, the biggest thing for the 1986 team is they are a dominant offense and fast-break team relative to any recent Celtics team. The 2008 team was, imo, the best defensive team (though clutch-time 2024 Celtics were close). For me, the thing the 1986 Celtics would have done is rebounded, run, and beaten up anyone after them. If you look at the 2008 Celts, Garnett would have been able to stick with McHale....but Bird would have destroyed them, and Perkins would have struggled with Parish's running. They are a bit like this year's roster in that the other (non-Walton) bench guys were less great players than great fits---Wedman and Sichting are not that unlike Hauser and PP. And instead of versatile Al, you have occasionally dominant Walton.
Any combination of those would be fun to watch play, and all were quite dominant in their season. But for me, the 1986 Celtics had a combintion of elite play and versatility offensively that would have put them over the top