DORM vs LKQ vs MPAA vs STRT vs ALSN

For growth investors, Dorman Products, Inc.

(DORM) is the stronger pick with 6. 0% revenue growth year-over-year, versus -6. 7% for Allison Transmission Holdings, Inc. (ALSN). LKQ Corporation (LKQ) offers the better valuation at 12. 2x trailing P/E (9. 5x forward), making it the more compelling value choice. Analysts rate Dorman Products, Inc. (DORM) a "Buy" — based on 16 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, LKQ Corporation (LKQ) is the cheapest at 12.

2x versus Dorman Products, Inc. at 18. 8x. On forward P/E, LKQ Corporation is actually cheaper at 9. 5x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Allison Transmission Holdings, Inc. wins at 0. 60x versus LKQ Corporation's 4. 01x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Allison Transmission Holdings, Inc.

(ALSN) delivered a total return of +183. 5%, compared to -51. 7% for Motorcar Parts of America, Inc. (MPAA). Over 10 years, the gap is even starker: ALSN returned +373. 8% versus MPAA's -62. 7%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Dorman Products, Inc.

(DORM) is the lower-risk stock at 0. 85β versus Strattec Security Corporation's 1. 53β — meaning STRT is approximately 80% more volatile than DORM relative to the S&P 500. On balance sheet safety, Strattec Security Corporation (STRT) carries a lower debt/equity ratio of 5% versus 156% for Allison Transmission Holdings, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Dorman Products, Inc.

(DORM) is pulling ahead at 6. 0% versus -6. 7% for Allison Transmission Holdings, Inc. (ALSN). On earnings-per-share growth, the picture is similar: Motorcar Parts of America, Inc. grew EPS 60. 6% year-over-year, compared to -11. 8% for Allison Transmission Holdings, Inc.. Over a 3-year CAGR, STRT leads at 7. 7% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Allison Transmission Holdings, Inc.

(ALSN) is the more profitable company, earning 20. 7% net margin versus -2. 6% for Motorcar Parts of America, Inc. — meaning it keeps 20. 7% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ALSN leads at 32. 3% versus 4. 0% for STRT. At the gross margin level — before operating expenses — ALSN leads at 48. 4%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Allison Transmission Holdings, Inc. (ALSN) is the more undervalued stock at a PEG of 0. 60x versus LKQ Corporation's 4. 01x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, LKQ Corporation (LKQ) trades at 9. 5x forward P/E versus 15. 3x for Motorcar Parts of America, Inc. — 5. 8x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for MPAA: 74. 4% to $20. 00.

In this comparison, LKQ (4.

2% yield), ALSN (0. 9% yield) pay a dividend. DORM, MPAA, STRT do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Allison Transmission Holdings, Inc.

(ALSN) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 1. 11), 0. 9% yield, +373. 8% 10Y return). Strattec Security Corporation (STRT) carries a higher beta of 1. 53 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ALSN: +373. 8%, STRT: +49. 3%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Consumer Cyclical sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: DORM is a small-cap quality compounder stock; LKQ is a small-cap deep-value stock; MPAA is a small-cap quality compounder stock; STRT is a small-cap deep-value stock; ALSN is a mid-cap deep-value stock. LKQ, ALSN pay a dividend while DORM, MPAA, STRT do not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.