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I really don't like this new crop of turbocharged engines. They all advertise full boost at just over 1000rpm. To get that most of them are decreasing the turbine efficiency as they aren't using VGTs, and building up quite a bit of backpressure in the exhaust (even with electronically controlled wastegates I imagine). A 1 liter engine is probably going to be at high enough load levels on the highway to generate some non-trivial amount of exhaust pressure like this.
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