I don't know why Toyota having their own great 4.5L turbo diesel V8 would ever want to buy a brand new unproven cummins engine. It must be the tough US emissions or some other politics. Toyotas are good trucks but for now with unchanged engine lineup it is no match for the Ram ecodiesel. Time will tell. I doubt that aluminum F-150 will come close to Rams average 25mpg. Sooner or later they all will have to put diesel, diesel hybrid or electric powertrains to stay competitive. For now I don't see myself in anything but Ram especially since for the first time in my life I bought a $55k truck without even test driving it. Crazy. Below specs of Toyota's big oil burner:
4.5L TOYOTA DIESEL V8
Configuration:
V8 Turbodiesel DOHC
Displacement:
4.5 liters
Block/Head Material:
• Compact graphite iron (CGI) block.
• Cast aluminum cylinder heads.
Injection:
Common rail
Aspiration:
Twin turbocharged
Horsepower:
265 hp @ 3,400 rpm
Torque:
480 lb-ft @ 1,600 rpm