Abaranger

 These screen captures are from the fansubbed Abaranger movie.  I'm sure I have it somewhere on my hard drive, and I'm sure I've watched it, but I don't remember much about it other than it had something to do with ice.  I'm sure it was entertaining, since the whole series kept me watching all the way through.  Though now that I've finished that one I don't remember that much about it, other than the thousands of toys they could make with all the robot dinosaurs and various combination robots said robot dinosaurs make.  There's at least five different kind of super mega robots involved here.

I know how marketing works, and these shows exist to sell the toys, but it's really not needed to see them every episode.  And there are a few that don't feature giant robots and monsters.

Still, at least the shows are dramatic when they should be, and don't shy away from killing various members of the team.  This did happen way back in Goranger, so it's hardly unprecedented.

I'm not sure if this was the first Sentai since SunVulcan to start with three members and add four and five later on.  Toei did this a few times, notably with GekiRanger.  Heck, they even added the now obligatory sixth member there.  I think this was the second series to feature dinosaurs, after Zyranger.  There might be two more now, but better dinosaurs than cars.  Pretty much better anything than cars.