I was suggesting the 1GR-FE (w/newer 6-speed) for the LC250 only for the relative simplicity and proven reliability/durability. To many, that is integral to the LC brand. I’m not saying the new turbo’d hybrid i4 will not be durable or reliable, but it certainly isn’t proven in the eyes of many old LC enthusiasts. The 2.4 iForce Max is clearly the winner when it comes to power, emissions, and fuel efficiency.
If the LC250 as-is starts at $55k, how sweet would it be if it had a 1GR-FE w/6-speed starting at $50k? Now that’s a winner! I don’t recall the price differential for the i4 vs v6, but it would be a similar situation to what Toyota did in 2009 by offering the 2.7L i4 in the first year of the 5th gen 4Runner.
Every engine was brand new and unproven at one point, including the 4.0L 1GR V6 in late 2002.
Slapping a 6-speed automatic (or manual) on the 4.0L wouldn't be much of an improvement over the 5-speed. A couple years ago, people kept hoping Toyota would "sort of modernize" the 5th gen by swapping out the 5-speed for an 8-speed, which never happened.
There's also economies of scale. The 4.0L was going in fewer and fewer vehicles as time went on. But the new 2.4L is going to have big economies of scale, sold in several vehicles worldwide.
The 4.0L V6 is a great and venerable engine, but an 8 or even 10 speed transmission can only go so far to mask the engine's inherent lack of torque and uneven powerband. This engine scoots well under 2000rpm around town, can really put some power down at redline when you need it, and then is entirely underwhelming in the RPM range in between.
I think Toyota will do the Tacoma thing to the 4Runner to help get the price that much lower: offer a non-hybrid version of the 2.4L turbo. That helps assuage some of the purists who at least want to skip hybrid complexity (even if Toyota is the king of reliable hybrids for 25 years and counting).
If the mpg was still pretty good in the non-hybrid 2.4L turbo, I'd be tempted to go that route. But the hybrid offers goodies too, like the 2400 watt inverter in the new LC250, which can presumably run at least a portion of that wattage off the hybrid battery with the gasoline engine not running. It would be nice to be able to use an electric griddle or coffeemaker in my 4Runner, lol. I have a 375W mini skillet I could hook up to the 5th gen, but idling a 4.0L engine to cook two eggs seems silly lol