Aren't the traffic conditions supposed to be good ?

I know the power of Corolla, and I also know what it feels like to have three people in the trunk... Going uphill, Corolla needs 4500 rpm, while Serena needs 1800-2200 rpm... If the engine speed is too high, it will consume more fuel. On flat ground, it's no problem. I drove the Corolla like an A200 in China. We raced on the same road, and we were neck and neck, but this was only the case up to 80 km/h. In the US, where the roads are often 120-140 km/h, and you have to adjust the output based on the decrease in atmospheric pressure at high altitude... At 3000 meters, the power of the 1.8 Corolla is only at the 1.2 level of sea level. When I picked up Serena in San Francisco, every time we started at a red light, the tires would screech, but on the flat roads in mountain towns, the tires wouldn't screech. The contrast is so obvious. No wonder there are more Camrys in poor states in the western US, even more than Corollas... While in wealthy states in the east, there are more Corollas... The western mountains do need a large displacement. Los Angeles, San Francisco, San Diego, and Sacramento, as well as the Highway 1 between them, do not need a large displacement. As long as you need to climb a mountain, you will need a large displacement. In the past few days, I have been to four places with an altitude of over 2500 meters. At high altitude, the small displacement engine will roar but have no power, which will significantly reduce the driving experience.