The antonyms for the term "more clunker" refer to a vehicle that is in excellent condition and runs smoothly. Some of the opposite terms include new, reliable, refined, efficient, advanced, high-performing, and sleek. A high-performance car is the opposite of a clunker; it's a powerful automobile known for its performance and superior engineering. Similarly, a brand-new car is the opposite of a clunker, meaning the car has the latest technology, design, and features. A reliable car is well-maintained and dependable, fulfilling its purpose without causing any inconvenience. In contrast, a clunker is an old, worn-out vehicle with mechanical issues and outdated technology.