ZIL. Not a sports car, but it had a heck of a warranty. Everything was hand made. If a door hinge squeaked or the speedometer quit, the entire Zil manufacturing department responsible, got shipped to Siberia. Emphasized camaraderie in quality control.
The 24, 27 and especially the 31 flooded RV batteries are all acid bulimic. Ten pounds of......, uh, well, you know, stuffed into a five pound sack. Blivet engineering.
Floor space is always at a premium so when more capacity is called upon, just like in a city, up, is the only option. Taller batteries.