The 2018 S4 represents a significant moment in the evolution of the Audi performance sedan, marking the final generation of the four-ringed icon to utilize a naturally aspirated engine. Offered as a pillar of the mainstream luxury segment, this model year combines aggressive exterior styling with a meticulously tuned chassis that prioritizes driver engagement. Understanding the 2018 S4 specs is essential for anyone seeking a balance of refined comfort and thrilling performance without crossing into the territory of the higher-trim RS models.
Engine and Performance Specifications
At the heart of the 2018 S4 lies a 3.0-liter turbocharged inline-six engine, codenamed EA837, that produces 349 horsepower and 329 pound-feet of torque. This powerplant, borrowed from the MLB Evo platform, delivers a robust powerband that sustains momentum well into the rev range. Unlike its predecessors, this unit forgoes a traditional mechanical turbocharger in favor of a more compact design that reduces lag while maintaining strong mid-range punch. The engine is mated exclusively to an eight-speed automatic transmission that channels power to the rear wheels, with the Quattro all-wheel-drive system standing by to distribute traction precisely when needed.
Drivetrain and Quattro System
The Quattro system featured in the 2018 S4 is a generationally advanced version that uses a purely mechanical Haldex clutch rather than a multi-plate setup. This configuration typically biases 60% of the power to the front wheels and 40% to the rear, ensuring stability and efficiency during normal cruising conditions. When the system detects wheel slip, it can redirect torque rearward almost instantaneously, sending up to 70% of power to the rear axle. This intelligent distribution is a core component of the 2018 S4 specs, transforming a competent luxury sedan into a confident performer in varying weather conditions.
Exterior Design and Dimensions
Visually, the 2018 S4 distinguishes itself with larger hexagonal air intakes, slim LED daytime running lights, and distinctive wheel designs that range from 18 to 19 inches. The sport exhaust tips, positioned lower on the rear bumper, provide a subtle yet assertive growl that complements the aggressive stance without overwhelming the cabin. In terms of scale, the sedan measures approximately 192.7 inches in length, 73.6 inches in width, and 59.1 inches in height, sitting slightly lower than the standard A4 to enhance its sporty profile.
Interior Space and Comfort
Despite its performance focus, the 2018 S4 offers a surprisingly accommodating interior, with front seats that provide substantial lateral support and bolstering. The rear seat, while not designed for long-distance travel, retains enough headroom and legroom for average-sized adults, making it a practical choice for small families. The overall build quality is exceptional, featuring a mix of soft-touch plastics, premium leather, and brushed aluminum accents that underscore the model’s position within the luxury hierarchy.
Technology and Infotainment
Audi’s Virtual Cockpit is a standout feature, replacing the traditional cluster with a fully digital 12.3-inch display that can be customized to show navigation, media, or performance data. The standard MMI touch response interface is intuitive and integrates Apple CarPlay and Android Auto seamlessly, allowing for convenient smartphone connectivity. Advanced safety technologies, including adaptive cruise control, lane departure warning, and automatic emergency braking, are bundled into the premium package, aligning the 2018 S4 with contemporary safety expectations.
