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The 2023 Nissan Sentra remains an affordable choice and now has a starting price of $21,045 (all pricing includes a $1,095 destination fee).

Less fancied than many cars of its era, what set the Sentra 200 STI apart was its potent, high-revving SR20 VVL engine, producing 145 kW.

Variable valve timing and lift can dramatically change an engine's power output and efficiency. Here's how they work.