The best way to save your engine is, of course, to avoid driving in water-logged areas, except in case of an emergency. Also, if possible, park your car somewhere safe and retrieve it when the water level has subsided.
No engine, no matter how reliable, should have to endure a hydrostatic lock from water entering the combustion chamber. That said, an SUV will always be far better than a sedan, owing to its higher ground clearance and the relatively higher positioning of the air intakes.
Thus, if you’re determined to drive through water-logged areas, consider a Force Gurkha. It comes with a high-mounted air intake and a snorkel, which allows it an astonishing 700mm of water wading capability. It should sail through most waterlogged roads without issue.