I looked at the numbers for fuel cost again, to see what case can be made.
If I run the Tundra at 17 mpg and $3. / gal cost of unleaded, the per mile cost is $ .177 per mile.
The RAV4 hybrid at 41 mpg and $3. / gal cost of unleaded, the per mile cost is $ .0732 per mile. The difference (diff) is $ .1032 per mile.
At how many miles of driving (x miles) will the diff of $ .1032 per mile approach the purchase price? I get 242013 miles on the first pass. If I am going to drive it 242k miles, the RAV4 is free after the gas savings.
There has to be a better case.
If I drive the Tundra and I only want to drive it 150,000 miles, how much will the diff of $ .1032 per mile cost me to drive the Tundra instead of the RAV4. I get $15,495. more gas cost to drive the Tundra.
That's the number I want to see. A case can be made to drive the Tundra, but that $16k extra gas cost is what the hybrid drive or battery pack is worth minimum. I would bet Toyota will have a common platform hybrid drive, so when the version comes out in the Tundra, it may have a lot in common with the same drive on Lexus 500h. It will be a must have adder.
Toyota has the Hino division for medium and heavy trucks. Hino is in the Sprinter price range .They have been making diesel electric hybrid drives going back more than 30 years. You can get a Hino 195h, but there is no 4wd version AFAIK.
But there will be. There will be something in the next Tundra, Tesla, Rivian. I would bet the market is waiting, meaning there may be steep discounts and a case could be made.
The Toyota gen 4 hybrid drive is only out in a few models, Avalon, Camry, Lexus 350h, Rav4. The used 3 year old, under 50k miles, off lease price on those is hanging under $15,000 (for a $40k car). If you wanted a beater to put 100k miles on, I would look at those. but I would make sure it has the dual electric motor gen 4 hybrid drive.