This bubble chart visualizes the correlation between average torque, horsepower, and highway MPG across 31 car makes, using engine specifications from a CSV dataset. Bubble position encodes horsepower (x-axis) and torque (y-axis), while bubble radius represents highway MPG and color distinguishes car makes. The visualization includes interactive tooltips that display each make's name on mouseover, plus a legend showing MPG values and color categories. Built with D3 v7, it uses SVG rendering and employs d3.scaleOrdinal, d3.interpolateTurbo, and event handlers for the interactive features.