I know the scene you're talking about very well. I know the whole movie very well and its soundtrack is on my iPod playlist.
At the tender single digit age I saw it, the brutal, rapid and almost careless way that 4 characters were simply murdered - especially Ironhide who was such an integral part of the first TV season of Transformers - had a major jaw-on-the-floor impact on me, setting the mood and tension for the rest of the movie. It informed me that this Cybertonian war was serious business just in case the whole opening sequence with the planet being devoured didn't succeed in conveying that.
I identified with Daniel Witwicky and that epic Stan Bush song will always have a place in my heart. Can you imagine my joy when the same song is featured in Saints Row IV for a pivotal scene in the main story?
I have watched it again several times as a much older person and you know what? It's one of the few 80s movies/cartoons that survived the lack of rose-tinted glasses (I'm looking at you Galaxy Rangers). I didn't sit there with my cynical hat on thinking they were doing this to get money off me. The Sharkticon pitfight "One hell of a repair bill", the Dinobots "Me Grimlock say execute them!" sparking a revolution, Leonard Nimoy delivering that delicious line at Starscream's ceremony "Coronation Starscream? This is bad comedy" and then killing him. Just "BLAM!" and he turns to carbon dust. Sure it was cheesy but me and the kid down the street who had the VHS, we incorporated Wreck-Gar's "TV-Speak" in our shenanigans around the neighbourhood. We always cracked up at the same bit where Daniel says "Yeah! I did it!" because it was such a bad piece of dialogue.
There was so much other good stuff, I just can't see how Ironhide missing a chance to do some bad cowboy flick "it's gettin' cold Sarge...will ah see mah mutha-board again?" death rattle can somehow ruin it for you. Seriously?
I think what I'm trying to say in a very long-winded way is that it sucks you cannot enjoy the 1986 movie the same way I can.