Ang gasoline engine mas takot talaga sa baha bro. Best gasoline bets for you would be the 1.8L Revo M/T or the 2.0L Adventure M/T, though the Revo has the edge in ground clearance. Yun nga lang, despite the ancient nature of both cars, both engines are EFI already, which means flood wading capability is very much compromised.
Tell you what, get a diesel Revo and then fit bigger tires on it to further boost the ground clearance. I find it the least smoky among the diesel AUV lot. Both the 4JA1 and 4D56 are notorious for their smoky habits. Ito kung umusok, linis linis lang. Kung ayaw mawala, calibration. Tiyak na aayos yan. Yung amin, tumatakbo ng 145km/h*4600rpm sa SCTEX, absolutely no smoke to be seen from the tailpipe.