Engine: The A3 comes standard with a 2.0-liter turbocharged four-cylinder engine that produces 184 horsepower and 221 lb-ft of torque. The S3 gets a more powerful 2.0-liter turbocharged four-cylinder engine that produces 288 horsepower and 310 lb-ft of torque.
Transmission: The A3 comes standard with a six-speed manual transmission. A seven-speed dual-clutch automatic transmission is optional. The S3 comes standard with a six-speed dual-clutch automatic transmission.
Drivetrain: The A3 is available in front-wheel drive or all-wheel drive. The S3 is available only with all-wheel drive.
Suspension: The A3 has a front-strut and rear-multi-link suspension. The S3 has a more sophisticated front-strut and rear-multi-link suspension with adaptive dampers.
Brakes: The A3 has front and rear disc brakes. The S3 has larger front and rear disc brakes with Brembo calipers.
Wheels and tires: The A3 comes standard with 17-inch alloy wheels with all-season tires. The S3 comes standard with 18-inch alloy wheels with summer tires.
Exterior: The A3 and S3 have similar exterior styling, but the S3 has some sportier touches, such as a more aggressive front fascia, side skirts, and a rear spoiler.
Interior: The A3 and S3 have similar interior styling, but the S3 has some more upscale features, such as leather seats, a heated steering wheel, and a Bang & Olufsen sound system.
Pricing: The A3 starts at $34,900. The S3 starts at $44,900.
Overall, the Audi A3 and S3 are both excellent choices for compact luxury sedans. The A3 is a great option for those who are looking for a stylish and efficient car. The S3 is a great option for those who are looking for a more powerful and sporty car.
